18. As the U. S. economy has developed, what trend is apparent in modern times?
O People have a greater dependence on renewable resources.
O Fewer people live in urban areas than in the 1800s.
O Fewer people live in rural areas than in the 1800s.
O People have a greater dependence on steam power.
Please hel

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.