17)
banks and other financial institutions use savings deposits to borrowers by
using deposits to make loans.
x
в)
keeping deposits to earn interest.
saving deposits in a secure vault.
d)
spending deposits to improve the bank's safety.
21)

Banks and other financial institutions use savings deposits to help borrowers by  using deposits to make loans.

Option A

Explanation:

The two important functions of a bank are to lend loans and accept deposits. Bank accepts deposits from people for which interest is provided to them.With loans being one the core functions of a bank, these loans are given to borrowers through the deposits made by the people.This is done to ensure that the cycle of cash and money is maintained in the economy. Based on the need and requirements, the cycle is accelerated or slowed down.