Answer:
The purpose of a map scale is to help the user to know the distance between 2 or more cities or geographical elements.
The ocean floor or seabed can be divided into three major regions: the continental margins, abyssal plains, and mid-ocean ridges.
Answer:
A solar eclipse.
Explanation:
When the Moon passes between Sun and Earth, the lunar shadow is seen as a solar eclipse on Earth.
Hope this helps!
I'd guess b on this one. I don't know the definition of watershed, but the amazon is a pretty big expanse of water "stretching" a long way (albeit that water doesn't stretch).