Does anyone know the answer to this?

Why did large numbers of african migrate to the americas

Asap will mark geography final plz ! what are the benefits of international aid? (give me the right evidence )

Match the mountains with the type of collision that formed them. a. andes b. aleutians c. north american cordillera d. appalachians 1. continental- continental 2. continental- oceanic 3. oceanic- oceanic 4. arc- continent