6355. He is known for his compliant nature.

✅ The correct answer is option D.
Livid : furiously angry.

Complaining : the expression of dissatisfaction or annoyance about something.

Adamant : refusing to be persuaded or to change one’s mind.

Yielding : (of a person) complying with the requests or desires of others.

Compliant : disposed to agree with others or obey rules, especially to an excessive degree; acquiescent.

Synonym of Compliant is Yielding