Ascientific theory is proposed after several valid investigations. this makes scientific theories

elaborate descriptions of observations
the most powerful explanation scientists have to offer
unchangeable by other scientists over a period of time
unacceptable to a majority of scientists

How would i answer this for an exam?

Which statement best explains distribution of natural resources? people tend to settle in locations that have the resources they need for survival. some countries have resources that others lack, so trade between countries becomes vital. fossil fuels come from areas that have mountains and other areas that manufacture synthetic gas. areas with natural resources provide a higher standard of living and better quality of life.

Which of the following terms best characterizes the government of somilia