Final answer:
As summer approaches in the Northern Hemisphere, the Earth is tilting and thus 'moving' towards the Sun due to its axial tilt, causing the increased direct sunlight that leads to the warmer summer temperatures.
Step-by-step explanation:
As summer approaches in the Northern Hemisphere, the correct answer to the question 'As summer approaches, the Earth is moving ____ the Sun' is C. Towards.
During its annual orbit, the Earth's axis is tilted at 23.5° relative to its orbital plane. This tilt causes the Northern Hemisphere to lean towards the Sun during its summer months, specifically in June, leading to more direct sunlight and warmer temperatures. Conversely, in December, the Southern Hemisphere leans towards the Sun due to the same axial tilt, while the Northern Hemisphere leans away, resulting in cooler temperatures and winter in the Northern Hemisphere.
It's important to note that the Earth's distance from the Sun changes very little throughout the year. The concept of 'leaning into' the Sun primarily refers to the tilt of the Earth's axis and not the physical distance to the Sun, which is not the primary cause of the seasons.