The idea that a biological structure, like the eye, that originally conferred a certain benefit might later confer the same benefit to a much greater degree

INTENSIFICATION OF FUNCTION

Explanation: Intensification of function is a term used to describe the evolutionary change that takes place in the adaption or functions of an organism without creating another organ or anything new.

When a organism's eyes have been known to not be able to see objects as far as 50meters later starts seeing very distant object without any known factor is known as INTENSIFICATION OF FUNCTION. Most living organisms experience some forms of Intensification of function during their life cycle.

c.more precipitation,but only when emission levels.