Concept:An equinox is the time when the Sun is directly above the Equator, causing day and night to be roughly equal all over the world.Explanation:During an equinox, the Earth's axis is not tilted toward or away from the Sun.Therefore, the Sun's rays fall almost vertically on the Equator and spread evenly across latitudes.As a result, every place on Earth receives about 12 hours of daylight and 12 hours of darkness.This means the length of day and night becomes nearly equal for all locations.Answer:B. All places across the globe experience equal lengths of day and night.