the equator receives the most amount of direct sunlight throughout the year
sun's_light is what_heats_earth. direct_sunlight is sunlight. humans_darken_when is in_direct_sunlight. humans_darken_when is not in_direct_sunlight. sunlight has effect_of_heating_earth sun's_light is not what_heats_earth. sunlight has not effect_of_heating_earth sun is stronger_at_equator. sunlight is not light. direct_sunlight is not sunlight.