Question

b) choose the best answer.
what does the illustration show?
a convection current of air in a cycle
thermal expansion as water expands
transfer of energy from water to sand by conduction
effect of radiation on the ocean

Explanation:

The illustration shows air movement. Convection currents involve the transfer of heat through the movement of fluids (liquids or gases). In this case, the air is moving in a cycle (hot air rising over the land and cooler air moving in from the water to replace it), which is characteristic of a convection current. Thermal expansion (related to water expanding due to heat) is not depicted. Conduction (direct transfer of heat through contact, e.g., water to sand) is not the main focus as the image shows air movement. Radiation (transfer of energy via electromagnetic waves) is also not the main concept here.

Answer:

a convection current of air in a cycle