David is a sixty-year-old man. He suffers from joint pains and often falls sick. As a result, he finds it difficult to sleep. He, however, tries hard to go to sleep, which creates autonomic activity and muscle tension. In this scenario, David is most likely suffering from.

The question is incomplete as it does not have the options which are:

a.narcolepsy

b.sleep apnea

c. insomnia

d.sleep terrors

c. insomnia

Explanation:

Insomnia refers to a sleeping disorder which is characterised by sleep lackness. The disorder happens when the person does not take enough sleep of 7-8 hours.

The person feels low energy which reduces the health of the person as well as the performance.

In this question, since the person when tries to sleep find it's very difficult to sleep as a result of which the body shows the symptoms of insomnia like muscle tension and the autonomic activities.

Thus, Option-C is the correct answer.

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fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.