Question

¿qué accidente geográfico separa las dos subregiones al este de los grandes lagos?
el río san lorenzo
la bahía de hudson
el río misisipi
el océano pacífico

Explanation:

The Saint - Lawrence River separates sub - regions to the east of the Great Lakes. The Hudson Bay is far to the north, the Mississippi River is to the south - west of the Great Lakes, and the Pacific Ocean is on the western coast of North America, far from the regions east of the Great Lakes.

Answer:

El río San Lorenzo