Define open system. a. a group of unconnected things that work together to form a complex whole
b. a group of things that do not work together to form a complex whole
c. a system that maintains itself on a limited amount of resources
d. a system that receives input from and gives output to an outside environment

How much water is in the ocean in cubic kilometers

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 of the following terms best characterizes the government of somilia