What would likely be a common example of an annuity?

An annuity is typically a financial product that provides a series of payments made at equal intervals. This concept aligns closely with a mortgage, as a mortgage involves a borrower making regular payments over a predetermined period until the debt is repaid. Each payment made towards a mortgage can be thought of as an annuity because it consists of consistent, structured payments over time that amortize the loan balance.

In contrast, a savings account does not provide scheduled payouts but instead allows for interest growth over time, which does not fit the definition of an annuity. A bond, while it does provide periodic interest payments, functions more as a loan to the issuer rather than a structured payment plan like an annuity. Lastly, stock investment typically yields dividends when declared, which can be irregular and are not guaranteed, further distancing it from the concept of an annuity that provides fixed payments. Therefore, the mortgage serves as the best representation of an annuity among the options provided.