What is the longest mountain chain in south america?

Distance that the transcontinental railroad covered from omaha to san francisco.

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.

Mengapakah wujudnya perbezaan tanggapan terhadap sumber?