Fatigue is temporary loss of strength and energy resulting from hard physical, _______ or nervous exertion (stress).
intestinal
incidental
mental
psychological
Understanding the Causes of Fatigue Fatigue is temporary loss of strength and energy resulting from hard physical, _______ or nervous exertion (stress).
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The correct answer is mental.
Explanation: Fatigue can result from challenging physical activity, but it can also be influenced by mental exertion. The term “mental exertion” refers to the effort required in cognitive processes, such as concentration or working through challenging problems. Thus, “mental” fits best in the context of the sentence, as fatigue is not only linked to physical activities but also to stress and mental tasks.