Which word would best describe a person showing fortitude?

The word "resolute" is the best descriptor for a person showing fortitude because it conveys a sense of determination and firmness in purpose. Fortitude refers to the strength of mind and courage that allows someone to face challenges and difficulties with bravery and resolve. A resolute individual remains steadfast in their decisions and actions, demonstrating inner strength and a commitment to their goals, even amidst adversity. This aligns perfectly with the concept of fortitude, as it highlights a proactive and courageous attitude toward challenges. In contrast, the other options suggest weaker or less assertive traits, such as timidity, lack of feeling or enthusiasm, and indecision, which do not embody the essence of fortitude.