What does metabolism mean? A advancements made in medical research
B procedures that are followed in hospitals
C processes that allow living things to grow and survive
D discoveries that have been made in space

C) processes that allow living things to grow and survive

Explanation:

Metabolism is when your body does specific processes to allow you to grow and survive. For example, your stomach will do certain techniques of metabolism to break down the food you just ate. Metabolism can be processed by the whole body or one organ.

answer: "the beating heart symbolizes the narrator's conscience, or his sense of guilt and wrongdoing" so its b

explanation:

"to look at him, or hear him describe it, he had no guilt. however, poe decided to symbolize this man's subconscious guilt through the heartbeat."