Q: What is the low level of radiation that occurs naturally in the environment called?


Read this paragraph and choose the correct option from the provided answers:

A low level of radiation occurs naturally in the environment. This is called background radiation. It comes from various sources. One source is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space. Background radiation is generally considered to be safe for living things.

 Choices:

- temperature radiation

- neon radiation

- consequence radiation

- background radiation


A:
background radiation