Money saved grows primarily through compounding.
Compounding refers to the process where the interest earned on an investment is reinvested to generate additional earnings over time. This means that not only the initial amount saved earns interest, but the interest itself also earns interest, leading to exponential growth of the money saved.
The other options—taxes, revolving credit, and amortization—do not directly contribute to the growth of savings in the same way. Taxes can reduce the amount of money you earn from your savings, revolving credit typically incurs interest charges and is used for borrowing rather than saving, and amortization is a method of paying off loans rather than growing savings.