Final answer:
Subsidized Student Loans and Un-subsidized Student Loans have to be repaid. Grants, work-study, and scholarships are financial aid options that do not require repayment. FAFSA is essential for applying to these federal student aid programs.
Step-by-step explanation:
The financial aid source that has to be repaid is C. Subsidized Student Loans and Un-subsidized Student Loans. Grants, work-study programs, and scholarships are types of financial aid that do not require repayment. Subsidized and unsubsidized loans are offered through the federal government to help cover college expenses. The major difference is that interest on subsidized loans does not accrue while a student is in school at least half-time, during the grace period, and during deferment periods. On the other hand, interest on unsubsidized loans starts accruing from the time the loan is disbursed.
To apply for federal student aid, including grants, work-study, and loans, students must fill out the Free Application for Federal Student Aid (FAFSA®) form. It's crucial to understand the differences between grants vs. loans to make informed financial decisions. Grants, such as those awarded after submitting the FAFSA, do not have to be repaid, while student loans always have to be repaid with interest.