Question

study the diagram illustrating a cause and effect of the second industrial revolution.

the west had natural resources that industries in the north needed for production. -> railroad workers laid thousands of miles of track after the civil war. -> ?

which phrase best completes the diagram?

factories in the north produced threshers and seed drills.
farmers did not need to employ as many people to keep up with production.
the growing population meant that farmers needed to produce more food.
the population grew in the west, and the availability of jobs attracted chinese immigrants.

Explanation:

The diagram illustrates a cause-and-effect chain during the Second Industrial Revolution. First, the West possessed natural resources required by Northern industries. To access and transport these resources, railroad workers laid thousands of miles of track after the Civil War. This expansion of the railroad network facilitated westward migration, stimulated economic development in the region, and created numerous employment opportunities, which in turn attracted diverse groups of laborers, including Chinese immigrants, to the American West.

Answer:

The population grew in the West, and the availability of jobs attracted Chinese immigrants.