The "lower body" refers to the part of the human body that includes the hips, legs, and feet. It plays a crucial role in movement, balance, and support. Key components of the lower body include the thighs, knees, calves, and ankles, which work together to enable activities like walking, running, and jumping. Muscles in the lower body, such as the quadriceps and hamstrings, are essential for strength and mobility. Regular exercise targeting the lower body can improve overall fitness and help prevent injuries. Activities like squats and lunges are effective for strengthening these muscles.