Correct Answer: Destitute

Solution : The correct choice is the fourth option.

Explanation:

Opulent is an adjective that describes a state of wealth, abundance, or luxury. The antonym destitute is used to describe a state of extreme poverty or lacking the basic necessities of life. Both words emphasise economic or material conditions, and they are opposites in terms of affluence.

The meanings of the other options are as follows:

• Insolvent refers to a state of being unable to pay debts or having no money.
• Flourishing means thriving or growing well.
• Depressed refers to a state of low spirits or sadness.