Question

What are green houses?

• A. Houses which allow heat to come in and go out.
• B. Houses which allow heat to come in and but not escape.
• C. Houses which do not allow heat to come in or go out.
• D. Houses which do not allow heat to come in but allows heat to go out.

Answer 1

The correct option is B Houses which allow heat to come in and but not escape.

People grow vegetables and fruits in very cold regions by building green-houses. These buildings have transparent roofs and walls which allow heat to penetrate in but not escape.