Heat energy travels from the Sun to the Earth primarily through which mechanism?
AConduction
BConvection
CRadiation
DA combination of all three.
Explanation
📌 Space is essentially vacuum. Conduction requires matter for contact; convection requires a fluid. Only radiation (electromagnetic waves) can cross vacuum. That is why the Sun heats the Earth. Distractor A and B require matter that is not there; D falsely implies multiple mechanisms work in vacuum.