Resting metabolic rate is a. the energy required to maintain vital body functions. b. the sum of all the processes by which food energy is used by the body. c. the body's daily energy expenditure. d. the energy required to digest food.

A person's Basal Metabolic Rate  is the daily amount of energy their body requires if at rest in a temperate environment.

Explanation:

This energy is used to support the functioning of the human body, and in particular is responsible for maintaining homeostasis.

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more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem