Which factor most likely made large-scale human migration from Asia to North America possible during the prehistoric age?
1. navigable waters created by rising sea levels
2. a continuous landmass preceded continental drift
3. a land bridge emerged during climate change
4. numerous islands formed by volcanic activity

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.

Answertropical depression;