Correct Answer: Brave

Solution : The correct choice is the first option.

Audacious describes someone who is willing to take bold risks or be daring. Brave is a synonym that aligns closely with these qualities, as it refers to showing courage and fearlessness.

The meanings of the other options are as follows:

• Stifling means oppressively hot or stuffy, causing discomfort.
• Lively means full of life and energy.
• Horrendous means extremely unpleasant, horrifying, or terrible.

Therefore, the correct answer is brave.