When the Conquistadors arrived in South America and began their take over, many Native American died. What was the main
cause of death for so many Natives?

Disease

Explanation:

When conquistadors came to the America's they brought with them Diseases that were completely foreign to them, and there body causing mass death from Disease.

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.