The diagram shows the sun’s interior. Convection currents are present in the convection zone.

An image of the sun is red and orange on the outside. A cutaway shows layers moving inward colored and labeled yellow convection zone, red, orange radiation zone, mixed colors, blue core.
Which describes how fluids change as they travel through the convection zone?

They change to solids near the Sun’s surface.
They change to solids near the Sun’s radiation zone.
They become more dense near the Sun’s surface.
They become more dense near the Sun’s radiation zone.