Correct Answer: leave

Solution : The first option is the correct answer.

"Abandon" means to desert, forsake, or give up completely. "Leave" has a similar meaning, indicating the action of going away from a place, often implying abandonment or departure.

The meanings of other options are as follows:

• Start means to begin or initiate something.
• Adopt means to take up or accept as one's own.
• Allow means to give permission or consent to something.

Therefore, the correct answer is leave.