Final answer:
Heat is distributed primarily through convection in the atmosphere, ensuring that the planet's heat is evenly spread. This is done through the transfer of heat energy via the movement of heated particles in the air. Through this convection process, heat from the Sun is carried around the planet, from the equator to the poles.
Step-by-step explanation:
“Heat is distributed primarily through convection in the atmosphere” best describes how heat (via solar energy) is distributed around the planet. Convection is the transfer of heat energy through the movement of heated particles. In this case, heat from the Sun warms the Earth's surface, causing the air to become less dense and rise. As the warm air rises, it carries heat energy with it, creating air currents and redistributing heat throughout the atmosphere. This convection process helps to distribute heat from the equator to the poles and around the entire planet.