A state agency has contacted you to do a scientific assessment of kudzu in a nature preserve in southern Georgia. They are concerned about the effects of kudzu (the non-native invasive vine) on a small rare plant that grows on the forest floor in the preserve, but which is found nowhere else in the state.
Kudzu is only growing in the east side of the preserve because it hasn't yet had time to invade further. In order to assess the effects of kudzu on the rare plant, you set up the following experiment:

Site 1. On the east side of the park with the kudzu, you set up ten 1m x 1m plots on the forest floor. In each plot you count the number of individuals of the rare plant.
Site 2. On the west side of the park without the kudzu, you set up ten 1m x 1m plots of the forest floor. In each plot you count the number of individuals of the rare plant.

In this experiment, Site 2 is your:
a) variable.
b) control.
c) replication.
d) hypothesis.
Question: Which among the choices is the best answer and explain why.

Can I possibly get someone's truthful opinion on this? I know it isn't a hypothesis and I'm kind of leaning towards saying it's either replication or control. We have to write a paper (500-700 words) explaining why we think its either of the four choices above. In the paper, I was going to explain why three of the answers above were not my choice and why the answer I chose was my choice (obviously). I would just like an opinion and a reason why.