Why do you think particular languages "choose" particular sounds? Why do you think that, for example, some African languages have click sounds that are not present in other languages? or why is there no difference between b and p in Arabic but such difference is made in English? In the same way, why is there a difference between "light" and "heavy" s and t in Arabic but such difference in turn is not present in English? 200 Words, this is for a linguistics class so make sure you use some terms. Thanks.