What is metabolism in living things?
a. the process of making energy from sunlight and using it to live.
b. the process of breathing to make energy to live.
c. the processing of metals into energy for life.
d. the process of taking in energy and using it to live.
e. the opposite of photosynthesis in plants.

Option D

Explanation:

The process in which the macro molecules breakdown in order to derive energy from them to sustain life is known as metabolism.

It includes intake of carbohydrates, fats, protein, nuclei acid and other compounds  in order to break them and obtain energy for various types of cellular processes is known as metabolism.

The macro molecules breakdown to provide energy that is used for living.

Hence, the correct answer is option D