Question

A farmer places unhatched chicken eggs under a heat lamp. How does the radiation help the eggs?

It keeps the area around the eggs cool until the eggs hatch.
It makes the eggs weaker so they are easier to break open.
It makes the eggs stronger so they do not break.
It keeps the eggs warm until they hatch.

Answer 1

It keeps the eggs warm until they hatch.

The heat lamp emits infrared (thermal) radiation, which warms the eggs and maintains the temperature needed for the embryos to develop and hatch.