You can use a _______ to save your money and earn interest on it at the same time.

The correct option is A savings account
$\Rightarrow$ You can use a $savingsaccount$ to save your money and earn interest on it at the same time.

$\Rightarrow$ Savings accounts pay interest on money in your accounts. As a result, your bank will make small additions to your account, typically every month.

$\Rightarrow$ The interest rate depends on economic conditions and your bank's desire to compete with other banks.