Answer:
Replacing an old student loan with a new student loan that has a lower interest rate
Step-by-step explanation:
Replacing an old student loan with a new student loan that has a lower interest rate is an example of refinancing. Refinancing involves obtaining a new loan to pay off an existing loan, usually with more favorable terms such as a lower interest rate or lower monthly payments. In this case, the borrower is replacing an old student loan with a new one that has a lower interest rate, which will result in lower overall costs and potentially lower monthly payments.