Answer: Keep your account open and you will earn more on Interest you've already earned
Explanation:
Since Tom's investment account at his bank has a compounding interest, the best advice that'll be offered to Tom is to keep the account open and he will earn more on Interest than what he has already earned.
It should be noted that compound interest makes ones money grow faster. The reason for this is due to the fact that the interest is calculated based on the accumulated interest that the individual has earned over time and the original principal.
Therefore, it isn't advisable for Tom to withdraw his money or ask the bank to compound the interest less frequently but rather, he should keep the account open as he'll earn more interest.