This one is extremely easy. I am positive the answer is C.
Answer:
The early symptoms of HIV is fever, swollen mouth, and fatigue.
It ensures that there is proper conduction of heat
If some living things do not reproduce this could be considered a defect or a genetic mutation in those people. If we take humans for example, if most humans reproduce and some don't because they cannot (if a guy cannot produce sperm) this doesn't mean that he isn't alive, it just means he was born with a genetic mutation which doesn't allow him to produce sperm needed for reproducing.
