Which of the following forms a theory explaining the Great Atlantic Migration?

economic push factors in Europe resulting from crop failures economic push factors in Europe resulting from crop failures environmental pull factors in the U.S. held a desirable climate environmental pull factors in the U.S. held a desirable climate economic pull factors in Europe due to industrial growth economic pull factors in Europe due to industrial growth political push factors in Europe due to governmental instability

All of the following factors contributed to the Great Atlantic Migration Theory:

1) Economic push factors in Europe resulting from crop failures.
2) Environmental pull factors in the U.S. due to its desirable climate.
3) Economic pull factors in Europe due to industrial growth.
4) Political push factors in Europe due to governmental instability.

The theory that explains the Great Atlantic Migration includes economic push factors in Europe resulting from crop failures, environmental pull factors in the U.S. due to its desirable climate, economic pull factors in Europe due to industrial growth, and political push factors in Europe due to governmental instability.

To determine which of the options forms a theory explaining the Great Atlantic Migration, we can examine each option and evaluate its relevance to the phenomenon.

1. Economic push factors in Europe resulting from crop failures: This option suggests that economic difficulties in Europe caused by crop failures pushed people to migrate. While crop failures did contribute to economic hardships, they were not the primary factor driving the Great Atlantic Migration.

2. Environmental pull factors in the U.S. held a desirable climate: This option suggests that the attractive climate in the U.S. pulled migrants from Europe. Climate indeed played a role in attracting migrants, but it alone does not fully explain the migration phenomenon.

3. Economic pull factors in Europe due to industrial growth: This option proposes that economic opportunities created by industrial growth in Europe pulled people to migrate. Industrial growth did contribute to economic pull factors, although it alone cannot account for the entirety of the Great Atlantic Migration.

4. Political push factors in Europe due to governmental instability: This option suggests that political instability in Europe pushed people to migrate. Political instability did play a role in prompting migration, but it was not the sole cause.

Considering the above evaluations, the most comprehensive explanation for the Great Atlantic Migration is a combination of economic push factors in Europe resulting from crop failures, economic pull factors in Europe due to industrial growth, and political push factors in Europe due to governmental instability. The interaction between these factors, along with environmental pull factors in the U.S., influenced the mass migration from Europe to the United States.