Why did virginia become a royal colony?

What contribution did the pilgrims make to the development of american government

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more.b-it made cross-country travel too expensive for ordinary americans.c-it decreased the safety of americans who moved to settle the plains.d-it shortened travel time between the east and west for all americans.

What was the most important consequence of the large-scale ecological changes in africa two hundred thousand years ago?