Final answer:
A type of insurance that lets you borrow against a reserve of money is called a reserve line of credit.
Step-by-step explanation:
A type of insurance that lets you borrow against a reserve of money is known as a reserve line of credit. This type of insurance allows individuals or businesses to access a predetermined amount of money when needed by borrowing against the reserve funds they have set aside. For example, a business may have a reserve of $100,000 and can borrow up to $75,000 against that reserve if they need it.