Mainly, the gold rush and warmer climate to farm. This drove people to settle in the west and south.
It would be A. hope this helps
Latin American independent movements
This is called the crust: oceanic crust is around 5 km (3 miles) to 10 km (6 miles ) thick and the continental crust is 20 to 30 miles thick, (still, i think that the word you're looking for is "crust" or "oceanic crust" to be sure.
Answer:
is an activity designed to test the validity of a hypothesis
Explanation:
The procedure which is carried out in order to support or validate a particular hypothesis is known as experiment. Experiments have varying goals and they always rely on the logical analysis of the experiment results.
Researchers or scientist all over the world use experimentation to support or disprove the existing theories or the new hypotheses coming up.