Correct Answer: To permit something to proceed.

Solution : The correct answer is the third option.

Explanation:

• In common usage, the term "green light" is often associated with traffic signals, where a green light signals permission to proceed.
• As an idiom, "green light" is used metaphorically to signify approval, permission, or authorisation for something to move forward or proceed.

Therefore, the correct answer is to permit something to proceed.