Hiii

A link of mechanism is an assembly of bodies connected to manage forces and movement. The movement of a body, or link, is studied using geometry so the link is considered to be rigid.

Link :- links are connected in such a way that no motion is possible, it results in a locked chain or structure.

Mechanism:-  mechanism is a constrained kinematic chain. This means that the motion of any one link in the kinematic chain will give a definite and predictable motion relative to each of the others.