The correct option is A Both the assertion and reason are true and the reason is the correct explanation for the assertion
Locomotory movements are voluntary movements that result in change of place or location; e.g. humans' limbs move when they walk from one place to another. Although locomotion is brought about by the movement of limbs or specialised structures like cilia or flagella, all movements will not result in locomotion. This is because the movement does not always cause a change in position. For example, human limbs move when an individual changes body posture like from a sitting to a standing position, or during actions like clapping.