19. A student claims that summer is warmer because Earth is closer to the Sun during that
time. Which of the following correctly explains why this is not the primary reason for
seasons?
Earth's orbit is a perfect circle, so the distance to the Sun doesn't change.
Earth is actually slightly farther from the Sun during the Northern Hemisphere's summer.
The Sun's energy output is lower during the summer months.
The tilt of Earth's axis causes the Northern Hemisphere to receive more direct sunlight in the summer.