You are given a sentence and your task is to generate another sentence that supports the given input.

To understand rainbows you have to start by understanding what is happening inside a prism to let it separate white light into its colors.
A prism helps people understand what makes up white light.

Gamma radiation is generated by radioactivity, the decay of radioactive (unstable) atoms both in Earth's crust and in the atmosphere, and in reactions caused by cosmic ray collisions with atmospheric constituents, as well as by the decay of elementary particles produced by these collisions.
Radioactive atoms, nuclear explosions, and stars produce gamma rays

Active transport requires energy from the cell.

All cells need energy for processes like active transport.

