Equilibrium is best defined as a state of

Equilibrium is best defined as a state of physical balance.

Explanation:

Physical balance is a term used to describe the situation in which the forces acting on a body on its internal and external side are equal. That is, the resulting force in this body is zero. In this case, we can say that this body is in a situation of equilibrium, where all things are in harmony and nothing is standing out or being ignored. That way all the factors that allow a body to function will function normally in a regulated and efficient way.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.