Question

what is green house?

Answer 1

$\underline\mathtt\red{GREEN \: HOUSE:}$

It is an outdoor structure that is used to house plants. Often a simple frame covered by glass or plastic, greenhouses work by insulating the environment, to a point, in order to extend the growing season.

Answer 2

A greenhouse is a structure with walls and roof made chiefly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown. These structures range in size from small sheds to industrial-sized buildings. A miniature greenhouse is known as a cold frame.