One of the greatest migrations in history occurred

a. before gandhi led nonviolent protests

b. after east pakistan became bangladesh

c. during the british colonial period

d. after indian independence

me 

Drag the tiles to the correct boxes to complete the pairs. match the stages to their features. low birth rates, death rates are constant high birth rate, and death rate high birth rate and low death rate pre-modern mature industrial industrialization

These factors threaten north americas ecosystems

What first caused people to consider that the continents were once one large landmass?