Where, I'm unsure, but when, I think I know. There is a theory that the first asteroid to hit Earth was actually a comet. It wiped out the dinosaurs.
D or c because one of them was agriculture that would be c but they also did the other two known as d but swaying towards c
Answer: It is used to show the force between two objects caused by gravity.
Explanation: The gravitational constant appears in Isaac Newton's universal law of gravitation.
{\displaystyle G}{\displaystyle G} is about 6.67430×10−11 N⋅m2/kg2,[1] and is denoted by letter G
Answer:
functional region is an area organized to function politically, socially, and economically as a single unit. Functional regions are centered on a focal point that connects other areas by various systems, such as transportation, communication, or economic activities.
South America, i believe. You might want to double check this to be sure that it's right!