Given the image below, which statement is true?

a. the maya, aztec, olmec, and inca civilizations were the only american empires able to fight off european colonizers.
b. the early civilizations of the americas were unaided by nearby geographic features.
c. all early american civilizations flourished nearby each other.
d. the modern-day distribution of native americans actually reflects the locations of ancient civilizations.

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.

Which event had the greatest impact on culture of south america

What geologic process is related to caldera formation?