Answer:
the correct answer is catabolism. it is the process through which energy is produced by breaking down fats or tissues.
Step-by-step explanation:
assimilation - process of absorbing nutrients in food by the body (happens mostly in the intestine)
circulation - process by which blood components (oxygen, carbon dioxide, nutrients, waste etc) is moved across the body.
anabolism - process of creating fats, tissues etc. Is the opposite of catabolism.
hope this helps （＾▽＾）