Physical courage urges a man to risk injury or death.

The correct answer is: A. compels.

Physical courage is the ability to face danger, pain, or uncertainty without being overcome by fear. It is often associated with bravery and heroism. Physical courage can be motivated by a variety of factors, including a sense of duty, a desire to protect others, or a need to prove oneself.

The word "compels" means to force or urge someone to do something. In the context of the question, physical courage compels a man to risk injury or death. This is because physical courage involves facing danger and uncertainty, which can be very frightening. However, physical courage also involves a sense of duty or responsibility, which can motivate someone to take risks even in the face of fear.

The other options are incorrect because they do not accurately describe the relationship between physical courage and risk-taking. The word "forces" means to compel someone to do something against their will. This is not the case with physical courage, which is a voluntary act. The word "persuades" means to convince someone to do something. This is also not the case with physical courage, which is not based on persuasion. The word "forbids" means to prohibit someone from doing something. This is also not the case with physical courage, which is not prohibited.