Can you help me please I’m stuck :(

What from the columbian exchange had perhaps the biggest impact on the world?

He scientific revolution encouraged scientists and philosophers to

Which statements describe einsatzgruppen? check all that apply. they were considered the last step in the "final solution." they were part of the german army. they carried out mass executions. they were known as mobilized killing units. they were used by germany during the invasions of poland and the soviet union.