Correct the sentence:
"each of the animals have specific requirements for survival."

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.

i believe it is he has been given the drum as a joke.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.