Question

1. what causes earths seasons?

the distance of earth from the sun in relation to the other planets in the solar system
the number of lunar phases that occur in a month on earth
the eccentricity of earths orbital path
the tilt of earths axis

Explanation:

The tilt of Earth's axis causes different parts of the Earth to receive varying amounts of solar radiation throughout the year, leading to the seasons. The distance from the sun (related to other planets or orbital eccentricity) and lunar phases do not cause Earth's seasons.

Answer:

the tilt of Earth's axis