They are electromagnetic waves because mechanical waves have to be physically created by something, while electromagnetic waves are just emitted without any effort or force.
Precious gems would be my best guess, it's the only natural rescource that's only in one area. Sooo.... Precious gems i guess
Answer:
5. 16
I do not understand what you wrote for the rest
Explanation:
To study the spatial patterning of forests and forest fires and plan for better use of fire fighting resources in the U.S.
