How does Earth's position relative to the sun cause the four seasons?

ANSWER C, Earth axis is tilted with respect to its orbit, so, as it revolves around the Sun its tilt with respect to the sun change, resulting in four season.

Explanation:

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.