Argument vs description vs explanations

some assistance with the following passages to determine if they contain an argument/description or explanation and the reasons as to why they are an argument, description or explanation.

The first passage is

1. In Egypt, Persia, and Japan, orris powder was made from the dried root of the iris and used prodigiously in the art of perfumery. Orris has an odor not of iris but of violets. Until the recent development of chemical scents, most violet-perfumed products were made from orris, it being cheaper to produce than violet extract. Orris also has the ability to strengthen the odors of other perfumed substances and has been used for centuries as a fixative in the manufacture of powders and perfumes.
Orris came to prominence in Europe during the excesses of the French court prior to the Revolution. It was used to mask the unpleasant smells of stale body odor prevalent in high society, since bathing was considered unhealthy. One story tells of an argument between Louis XIV and his mistress Madame de Montespan that concluded with the lady telling the king that, for all her faults, she didn't smell as badly as he.
Orris powder was employed to scent and preserve the odoriferous and often lice-infested coiffures of the French aristocracy. Orris was mixed with flour to make a stiffener, so that the hair could be molded into fanciful sculptures studded with ribbons, pearls, beads, and artificial flowers.
Large quantities of Iris germanica var. florintina are grown in Mexico today for their roots, which are shipped to France for use in the cosmetic industry.

The second passage

2. When the U.S. National Aeronautics and Space Administration (NASA) launched the Hubble Space Telescope in 1990, the general public and scientists in the aerospace field both held high hopes. . . . But blurry images caused by a flawed mirror sent those hopes crashing to Earth. The U.S. Congress demanded an explanation for the failure. . . . Stress and health problems afflicted many NASA engineers. "It was traumatic," says the former director of NASA's astrophysics division, Charles Pellerin, who oversaw the launch of the Hubble. Nobody could see how to fix the problem.
Well, nobody except Pellerin. He not only had insight on how to solve the problem but found the funding and resources to repair the telescope, for which he received NASA's Outstanding Leadership Medal. But his real reward came over the next decade when the telescope provided spectacular images and important discoveries about stars, galaxies and other cosmic phenomena.
What was the secret of Pellerin's success? Dozens of other people at NASA had high IQs and world-class technical knowledge-they were, after all, rocket scientists. So what gave Pellerin the edge? What made him persist until the telescope was fixed when others felt overwhelmed by the challenge? His mind perceived reality differently. He reframed the situation as an unfinished project, not a failed one. He never lost sight of the potential for a positive outcome-a space telescope that worked. He saw how that positive future could happen as the result of technical solutions-corrective optics-package repairs performed by a crew of astronauts-that were possible with a rearrangement of funding and resources that already existed within NASA. By reassessing the situation, recognizing the potential and envisioning the repaired telescope, he was able to help orchestrate the unfolding of events that changed the future.

3. Some argue that file sharing is actually good for artists, because it is in effect promoting their work . . .
[However,] when recorded music is not paid for, there are clear and obvious implications for those who create the music-songwriters, performers and the record companies that make the actual sound recording. Consequently, since the rewards to production of music has gone down, it would seem reasonable to conjecture that the result will be less music, and less diversity of music, in the future. At a minimum, the possibility of recording artists and songwriters earning a living from selling their music is diminished. It is difficult to compete with "free".