Answer: Each of the animals has specific requirements for survival.
The indefinite pronoun "each" does not agree with the verb "have" in this sentence. "Each" suggests that the sentence is referring to one or every one of a certain number of animals. Because "have" is plural, we have to change it to "has" so it fits the sentence.
A. Best the reason why it is not better (even though it sounds right) is because it says "out of the five cousins" there for we are comparing ben to five other people and he is the best.
