6566. Foolhardiness is the result of constant strains.

✅ The correct answer is option D.
Exhaustion : a state of extreme physical or mental tiredness.

Obstinacy : the quality or condition of being obstinate; stubbornness.

Sickness : the state of being ill.

Foolishness : lack of good sense or judgement; stupidity.

Foolhardiness : recklessly or thoughtlessly bold; foolishly rash or venturesome.

Synonym of Foolhardiness is Foolishness