A bank acts as a key component of the financial system by mediating between depositors and borrowers.
Thus, banks channel surplus funds from savers to borrowers, supporting economic activities.
Source: Chapter 3 – Money and Credit, Loan Activities of Banks
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Examiners look for three clear points (1 mark each): (1) accepting deposits, (2) keeping a cash reserve and lending the rest, and (3) the interest rate difference as income/mediation role. Avoid writing a vague general answer — use the specific detail about ~5% cash reserve from the textbook to show precision. The diagram in the textbook (depositors → bank → borrowers) captures the core idea perfectly.