The correct answer is D. Fearful.
Timid means showing a lack of courage or confidence. Cowardly means lacking courage or determination; faint-hearted. Plucky means showing courage and determination in the face of danger or difficulty. Veteran means a person who has had long experience in a particular field.
A timid person is easily frightened and is reluctant to take risks. A cowardly person is afraid to face danger or pain. A plucky person is brave and determined, even in the face of danger. A veteran is a person who has had long experience in a particular field, especially the military.
In the context of the question, the correct answer is D. Fearful. This is because the question is asking for a synonym of the word “timid.” The word “timid” means “showing a lack of courage or confidence.” The word “fearful” means “feeling or showing fear.” Therefore, the word “fearful” is a synonym of the word “timid.”