Correct Answer: Inadequate

Solution : The third option is the correct choice.

Satisfactory refers to something that meets the requirements or expectations, indicating a sufficient or acceptable level of quality. On the other hand, inadequate means lacking in quantity or quality, falling short of what is necessary or required.

The meanings of the other options are as follows:

• Revive means to bring back to life, restore, or renew.
• Morose means gloomy, sullen, or ill-tempered.
• Diminish means to make or become smaller or less.

Therefore, the correct answer is inadequate.