Q: The magnet field of earth is called what?


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

Earth is a giant magnet with north and south magnetic poles and a magnetic field called the magnetosphere. Evidence in rocks shows that Earth’s magnetic poles switched positions hundreds of times in the past. Scientists think that Earth’s magnetic field is caused by the movement of charged particles through molten metals in the outer core.

 Choices:

- atmosphere

- troposphere

- ionosphere

- magnetosphere


A:
magnetosphere