Question

____ is the transfer of heat through the movement of fluids or gases, such as air or water, to differences in temperature and density.

Explanation:

Convection is a heat - transfer mechanism. It occurs in fluids (liquids and gases). The movement of the fluid is driven by temperature and density differences. When a fluid is heated, it expands, becomes less dense, and rises. Cooler, denser fluid then moves in to take its place, creating a circulation pattern that transfers heat.

Answer:

Convection