You are presented with the quiz "What does perspiration do?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "sweating reduces body heat" and "humans, of course, can sweat and perspiration tastes salty". So, what's the best answer to the question?
Options are: 1. decreases. 2. increase body heat. 3. Evaporation. 4. reduce body heat. 5. rain. 6. It gets heated up. 7. change weather. 8. It expands.
4.