Question

The surface zone is heated by the sun. This causes the warm water to become less dense and rise while the colder water is more dense and sinks. This is called…

Answer 1

Hello,

I think the correct answer is Radiation

Radiation: The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.

Hope this helps!!!! :)

**(Vanessa)**

Answer 2

gravity I think maybee