Correct option is (d) It damages the bones and skeletal muscles
Easiest explanation: The bones and the skeletal muscles function well when pressure is applied to them. It allows for better absorption of nutrients. When a young person uses a wheel chair for a long time, their bones and muscles stop absorbing the nutrients and the body becomes weak. Long use of wheelchairs by any population can cause other problems as well as the pooling of blood, pressure sores etc.