Correct Answer: Discourage

Solution : The third option is the correct choice.

Moil means to toil, work hard, or labour, often in a challenging or unpleasant way. On the other hand, discourage means to deter or hinder someone from taking action or pursuing a particular course.

The meanings of other options are as follows:

• Cultivate means to prepare and use land for crops.
• Grow means to increase in size, develop, or become larger.
• Work means engaging in physical or mental effort to achieve a purpose or result.

Therefore, the correct answer is discourage.