Step 1: Understanding the proverb.
"To drive home" means to emphasise or make something clear to someone, especially by repeating it or stressing its importance. It is often used when a point needs to be made in a strong and clear manner.
Step 2: Analyzing the options.
(A) To find one's roots: This is unrelated to the meaning of "To drive home".
(B) To return to place of rest: This is not the meaning of the phrase.
(C) Back to original position: This does not match the meaning of "To drive home".
(D) To emphasise: Correct — "To drive home" means to emphasise or make something clear.
Step 3: Conclusion.
The correct answer is (D) To emphasise, as it is the meaning of the idiom "To drive home".