I find that the best answer is the following one:
c. determined by factors outside our control
For example, even though life is very hard in the very hot and the very cold regions, we can't control it: so this is an example of a physical environment that is hard to control.
In comparison, it is often easier to describe than our social environment.
The answer is mudflow because of the addition of water to liquify the materials
Guess answer is congo basin (democratic republic of congo)
Explanation:
They are the same because they both are forced vibrations because both of them have a person or thing putting energy into the object. Also please clarify this question next time
