Definitely decompose dead organisms, otherwise there would be no oil for us.
Answer:
Calvin cycle is your answer.
Explanation:
hope it helps you.
The answer is A.
If the bicipe muscle contracts it will bring the forearm up because the insertion of this muscle is in the forearm.
One of the functions of this muscle is flexing the elbow, which would result in the action i already mentioned.
It couldn't be B, because that would be the work of another muscle, the triceps.