Birds of passage were: a. single women who worked until they got married. b. immigrants who visited settlement houses for temporary . c. strikebreakers who were sent in by factory owners. d. stowaways on passenger ships, attempting to immigrate to america. e. immigrants who planned on returning to their homeland.

The correct answer is
e. immigrants who planned on returning to their homeland.

It mostly applies to people from Europe who went there for a season or for a short amount of time and then they planned to return to Europe to spend the money. That was especially happening during the gold rush era when many immigrants came only for the gold.

E. immigrants who planned on returning to their homeland. Birds of passage was a term that was to describe immigrants that wanted to return to their homeland after having enough money to buy a piece of land. These people came to America for the opportunity to work and be in a large and growing economy, in hopes of getting some of the money to live a comfortable life back home.