Which best explains how buying on a margin increases the leverage?

Buying on margin increases leverage by allowing investors to purchase more shares than they could with just their own capital. By borrowing funds from a brokerage, investors can control a larger amount of stock with a smaller initial investment, amplifying both potential gains and losses. This means that even a small change in the stock's price can result in significant percentage changes in the investor's equity, enhancing the overall risk and reward profile of their investment strategy.