A lack of fortitude is

a. courage

b. ambition

c. motive

A lack of fortitude means a lack of Courage

Explanation:

When it is said that someone has fortitude it means that they have emotional power or strength and the person has the ability to withstand adversity in summary courage. People who are described as having fortitude are described in an admiring way for their courage.

A. Courage

Explanation:

Fortitude definition: courage in pain or adversity. Lack of fortitude would be lack of courage.