The answer is a I hope that helps
The Columbian Exchange is marked by the exchange of plant and animal life between the Old and New Worlds. The exchanges<span> of plants, animals, diseases and technology transformed European and Native American ways of life.</span>
Yes, it is true that linguists do not know for certain how language was developed by early humans, but they're able to determine that it started somewhere in Africa, due to human migration patterns.
Located at the southern tip of Africa's Great Rift Valley, Gorongosa National Park is home to an astounding diversity of animals and plants. Once known as "the place where Noah left is ark", wildlife populations were decimated by nearly two decades of civil war. Conservation efforts to restore the park are currently underway, with the support and cooperation of many organizations, most notably that of the Carr Foundation/Gorongosa Restoration Project. In 2011, the Field Museum of Natural History was invited to conduct biodiversity surveys on Mount Gorongosa - a recent addition to the park, and a crucial source of water for the surrounding lowlands.
The correct answer to this open question is the following.
Although there are no options attached, migration chains affect the immigration patterns or numbers of immigrants entering the country in that they increase the number of immigrants that try to enter the United States, trying to find better living opportunities or are escaping from political persecution in their respective countries.
A migration chain is a pattern that develops in the site where immigrants are established and form their communities. These former immigrants receive others that are coming and welcome them. So they keep their religion. traditions, customs, history, and culture, trying to form a tight bond, and not accepting the American culture. That is why in large American cities such as Chicago, Nee York, Miami, or Los Angeles, you can find ghettos or large Italian, Chinese, Korean, Mexican, Cuban, or Puerto Rican neighborhoods.