Step 1: Understanding the purpose of savings in banks.
Banks provide a secure place to keep money. Savings accounts offer interest and provide liquidity as money can be withdrawn when needed.
Step 2: Analyzing the options.
(A) It is safe – Correct, banks keep deposits secure.
(B) It earns interest – Correct, savings earn interest.
(C) Can be withdrawn – Correct, savings can be withdrawn at any time.
(D) All of these – Correct, because all reasons are valid.
Step 3: Conclusion.
Thus, the correct answer is All of these.