Here's why:
* Tension is a force that exists within a rope, cable, or other flexible object when it is pulled taut. This force acts in the direction of the pull.
* Gravity is the force that pulls objects towards the center of the Earth.
* When you lift an object, the rope or cable you are using experiences tension. This tension force acts upwards, directly opposing the downward force of gravity on the object.
Therefore, tension is the mechanical force that counteracts gravity and allows you to lift an object.