Question

cold, dense material sinks. material that is hot and less dense rises. what is described by this statement? convection cells continental cells conduction cells radiation cells

Explanation:

Convection is the transfer of heat by the movement of a fluid (liquid or gas). Hot, less - dense fluid rises and cold, dense fluid sinks, creating a circular pattern called convection cells. Continental cells are not related to this heat - transfer concept. Conduction is heat transfer through direct contact, not by fluid movement. Radiation is heat transfer through electromagnetic waves, not by the movement of hot and cold materials as described.

Answer:

A. convection cells