What are crescent shaped dunes called

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.

What is the best way to describes europe population

Which water sources contribute to a river system? check all that apply. groundwater lakes rivers streams watersheds