Investing contributes to economic growth primarily through the following way:
Investor funds are loaned to firms, who use borrowed funds to purchase capital. Funds from investors are used by firms to purchase capital which leads to economic growth.
This highlights how investments facilitate the acquisition of capital by firms, enabling them to expand operations, innovate, and ultimately contribute to economic growth. While the other options mention aspects of investment such as returns and risk management, the direct link to economic growth is most evident in the utilization of invested funds to enhance productive capacity.