Final answer:
The factor that controls solar intensity at the Earth's surface is the Earth's axial parallelism and sphericity. When the Earth's axis is tilted towards the sun, rays from the sun strike the Earth more directly, resulting in higher solar intensity and warmer temperatures. When the axis is tilted away from the sun, rays from the sun strike the Earth at a less direct angle, resulting in lower solar intensity and cooler temperatures.
Step-by-step explanation:
The factor that controls solar intensity at the Earth's surface is The Earth's axial parallelism and sphericity.
The tilt of the Earth's axis of rotation relative to the sun results in seasons. When the Earth's axis is tilted towards the sun, rays from the sun strike the Earth more directly, resulting in higher solar intensity and warmer temperatures. When the axis is tilted away from the sun, rays from the sun strike the Earth at a less direct angle, resulting in lower solar intensity and cooler temperatures.
The Earth's rotation speed, the Earth's magnetic field, and the Earth's distance from the Moon do not directly control solar intensity at the Earth's surface.