The correct answer is: A. Brain
The brain is the control center of the body. It sends signals to the muscles to move, and it also receives signals from the senses, such as sight and touch. This allows the brain to coordinate movement and maintain balance.
When a man walks along a path, his brain is constantly sending signals to his muscles to keep him moving in the right direction. The brain also receives signals from his eyes and ears, which help him to stay on track. If the man’s brain were to stop working, he would not be able to walk.
The hands and legs are also important for walking, but they are not the ones that control the movement. The hands and legs are controlled by the brain.
The eyes are important for walking because they help the man to see where he is going. However, the eyes do not control the movement of the man’s body. The brain controls the movement of the man’s body, and the eyes provide information to the brain that helps the brain to make decisions about how to move.