Q: What is the outermost part of the sun's atmosphere called?


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

The corona ( Figure below ) is the outermost part of the Sun's atmosphere. It is the Sun’s halo, or “crown. ” With a temperature of 1 to 3 million K, the corona is much hotter than the photosphere. The corona extends millions of kilometers into space. Sometime you should try to see a total solar eclipse. If you do, you will see the Sun’s corona shining out into space.

 Choices:

- rays

- ultraviolet

- particles

- corona


A:
corona