Question

which of the following happens in a fluid, when heated particles rise and cooled particles sink?
conduction
insulation
convection
radiation

Explanation:

Conduction is heat transfer through direct contact. Insulation is a material that reduces heat transfer. Radiation is heat transfer via electromagnetic waves. Convection involves the movement of fluid (liquid or gas) where heated particles (less dense) rise and cooled particles (more dense) sink, creating a circulation pattern.

Answer:

convection