Q: You are presented with the quiz "how do animals keep cool?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sweat is used for adjusting to hot temperatures by some animals" and "generally the most effective way for animals to keep cool in hot weather is by sweating". So, what's the best answer to the question?

Options:
1). body
2). swea
3). cilia
4). motors
5). heat
6). fluid
7). cold
8). dorsal
A:
2).