What does an economic system do?

Write a 150-word essay describing the effect of people's activities on the environment in the region.

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.

Seasons are a result of: a.) earths rotation on its axis b.)earths tilt on its axis c.) global air circulation patterns d.) global humidity circulation patterns