Overgrazing over farming and the diversion of water for irrigation are significant causes of

Landmasses on a flat map look distorted because

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.

Which most likely was persia’s most valuable asset?