Describe how early river valley civilizations innovated to meet their needs. (Be sure to define the need and describe how their innovation addressed the problem)

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.

In which horizon of soil profile is prevent material usually found

Fill in the combination notes for the main idea shown