Answer - C
Snakes periodically shed their skin in order to regrow new skin. Birds migrating to the south and bears hibernating are also a result of normal periodic transitions. However, extinction of a type of shrimp is most likely a result of a drastic change in the environment.
It is caused by changes in the suns position in the solar system
Temperature stays in warmer times, let go In colder times
Wind, water and temperature are the only factors that effect the rock(s). If there's an answer choice that says something besides those three options, that's probably your answer.
False
Muscles are only able to contract or relax. This is why they need complementary muscles. For example, the bicep can raise the forearm, but cannot lower it. For that, the tricep is needed.
