What caused the population to rapidly grow km the 1830s and 1840s?

The rapid population growth in the 1830s and 1840s was primarily due to a combination of high birth rates and increased Immigration, particularly from Europe. Many people were fleeing economic hardship, political unrest, and famine, notably the Irish Potato Famine, which led to a surge of Irish immigrants. Additionally, advancements in medicine and public health helped reduce mortality rates, further contributing to population growth during this period.