What are three areas that you could study to
learn about the inside of cells?

Cell membrane nucleus and the cytoplasm are the most important and easy to learn about

The cell membrane, nucleus, and cytoplasm.

Here is a song I learned to help you remember:

“Cells, cells, there made of organelles.
Try and pull a fast one the cytoplasm gels.
The nucleus takes over, controlling everything,
The party doesn’t stop till the membrane blocks the scene!
Incide the vacuole, we be floating around for hours,
Something bout’ cloraplast and sunlight showers!”

Hope this helps :)

It should be cryosphere and hydrosphere

Cotton was the very first