Final answer:
Refinancing refers to replacing an existing loan with a new loan featuring better terms, commonly a lower interest rate. This is exemplified by replacing an old student loan with a new one at a lower rate, leading to financial savings or quicker loan repayment.
Step-by-step explanation:
The borrower option that is an example of refinancing is replacing an old student loan with a new student loan that has a lower interest rate. This is because refinancing involves taking out a new loan to pay off one or more existing debts, and typically, the new loan has more favorable terms, such as a lower interest rate. Refinancing can lead to lower monthly payments, reduced overall interest costs, or a faster payoff of the loan.