What is the benefit of carrying heavy objects close to your body?

Carrying heavy objects close to your body is beneficial because it minimizes the risk of injury. When objects are held close, the center of gravity shifts closer to the body, which enhances stability and reduces the torque on the spine and muscles. This positioning allows the body's core muscles to work more efficiently to support the load, thereby decreasing the strain on the back and other muscle groups. It can help prevent overexertion and potential injuries that might arise from awkward lifting techniques or carrying items away from the body.

In contrast to the other options, which are not related to the primary biomechanical advantage of this practice, the focus here is on injury prevention. Carrying items close to the body does not necessarily affect muscle strength directly or improve vision or airflow, making the correct answer particularly relevant to the context of safe lifting techniques.