A Persuasive Essay is the correct answer because its a way to persuade the reader to agree with your claim (opinion). You need facts and evidence to help support your claim, which is what the reader will be looking for that will help them get on the same bandwagon as you (agree w/ you).
Because there is more to life than just money. For example, you cannot buy love with money. Maybe you can buy someone who loves you for your money. But not someone who loves you for who you are. You cannot buy love with money.