Answer:
The answer is demography.
Explanation:
Demogrpahers study places and regional and spatial concepts of how the world interacts with people.This essentially is a very important part of geography.
Answer: I believe it is “There were significant changes in scientific knowledge about planets”
Explanation: Since scientific knowledge has grown about planets, Pluto doesn’t fit some descriptions in order to be classified as one.
Answer:
U-shaped valleys, hanging valleys, cirques, horns, and aretes
Explanation:
