Primary sources can be described as those sources that are closest to the origin of the information. They contain raw information and thus, must be interpreted by researchers. Secondary sources are closely related to primary sources and often interpret them.
Answer:
I believe they are internal forces.
Explanation:
Hope my answer has helped you!
Answer:
Because, a natural hazard is a threat of a naturally occurring event will have a negative effect on humans.
Explanation:
it is 10 because you have to set up an equation to get the answer