Final answer:
The Tropical Plantation Region, which includes parts of the Caribbean and South America like coastal Brazil, influenced musical styles like highlife, palm-wine, and jújú due to the African cultural heritage associated with the history of plantation agriculture and the African slave trade in these areas.
Step-by-step explanation:
The region in the Americas that strongly influenced musical styles such as highlife, palm-wine, and jújú is the area known for its past with plantation agriculture, particularly the regions where African slaves were brought to work on plantations. This history of cultural exchange and the African diaspora contributed to the development of these music genres. The Tropical Plantation Region, including parts of the Caribbean and areas in South America like the northeast coast, where countries like Brazil had extensive plantation economies, are key examples of such influences.
African slaves, with their musical traditions, were brought to these regions to work on plantations growing crops like coffee and sugar cane. Post-emancipation, these influences mingled with those of the local and European populations, giving rise to new music genres. The African cultural heritage in these areas, thus, had a substantial impact on local music, influencing genres that spread and evolved across different parts of the world.