Answer:
Ireland
Step-by-step explanation:
Between the 1830s and 1850s, there was a large-scale immigration from Britain, Ireland, and Germany. Some were skilled manufacturing workers and craftspeople drawn to the early stages of industrialization. Many Irish immigrated to the developing textile mill towns of the Northeast, while others worked as longshoremen in the expanding port cities of the Atlantic and Gulf. The majority of the unskilled labourers who built the canals and railroads were Irish Catholics who settled in cities.
In 1820, there were 8,385 immigrants. By 1830, there were 23,322 immigrants; over the 1820s decade, the number of immigrants more than doubled to 143,000. Immigration increased by more than four times, reaching a total of 599,000, between 1831 and 1840. These comprised the second largest immigrant groups of the decade, consisting of roughly 152,000 Germans, 76,000 British, and 46,000 French, as well as about 207,000 Irish, who began to move in considerable numbers after Britain relaxed travel restrictions.
Have a lovely day :)