We use 70% of our energy to . A. sleep B. maintain our internal environment C. metabolize your food D. process chromosomes

we use 70% of our energy to  maintain our internal function. The answer is option b.

Most of the energy that our body produces is used to maintain the internal functions of the body.

Some of these functions includes:

Some of the other tasks that this energy is used for is work and also exercises.

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i don't know. the other person does though.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;