Europeans, although diseases did exist in the new world before the Europeans arrived. They just brought more.
Agriculture was part of the culture that they brought with them when they arrived from Polynesia. Before Europeans arrived at New Zealand, they grew: kūmara (sweet potato), taro, hue (gourds) and uwhi (yams). After 1820, they readily farmed plants that the Europeans brought.
Diseases, largely smallpox, brought by Europeans caused millions of deaths among the native Americans who had no resistance to these foreign diseases.
The Europeans brought Christianity to Australia.
Migration has brought a lot of people and ideas for example.migrationgreat migration
The Slaves initially arrived in the Americas because of the slave triangle, this was where the Europeans, travelled to Africa and took the Slaves to America, after which they returned to Europe completing the triangle.
Europeans brought civilization to the americas
Had no natural protection from diseases brought by Europeans.
World War 2 brought about a lot of migration to and from war town areas. The end of the war brought a baby boom to America from returning soldiers and citizens celebrating the end of the war.
The East Indians were brought to Trinidad in 1845 by the British colonial government. This migration was part of a labor scheme to replace the workforce lost after the abolition of slavery in 1834. The first group of indentured laborers arrived on the ship Fatel Razack, marking the beginning of a significant East Indian presence in Trinidad. This migration continued until 1917, with a total of approximately 147,000 individuals brought to the island.
When Europeans (or those being transported penally) arrived in Australia, many brought familiar livestock with them. Chickens were one such animal. They were small, hardy, and provided eggs and meat on the voyage.
There are a great many ways in which migration has affected Peru. Migration has brought a lot of people and ideas for example.