Guys i need !

explain what were the major contributions to the downfall of china’s last dynasty.

Which would be good historical evidence when studying manifest destiny?

Which physical feature minimizes population density in northern africa?

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.