Final answer:
The Foraker Act set up a civilian government in Puerto Rico whereas the Platt Amendment, amending the Teller Amendment, heavily influenced Cuba's sovereignty by giving the United States significant control over its foreign affairs and establishing a U.S. naval base at Guantanamo Bay.
Step-by-step explanation:
The Foraker Act of 1900 established a civilian government in Puerto Rico following the end of Spanish rule. It provided for a partially elected legislative assembly and a governor appointed by the President of the United States. However, it did not grant U.S. citizenship to Puerto Ricans or a path to statehood, labeling the island as an 'insular area'.
The Platt Amendment was a measure that altered the Teller Amendment, which initially declared that the United States would not annex Cuba. Instead, the Platt Amendment gave the U.S. significant authority over Cuba's foreign affairs, including control over Cuba's diplomatic actions, limitations on its debts, and the right to maintain a naval base at Guantanamo Bay. This amendment factored heavily in U.S-Cuba relations and affected Cuban sovereignty.
While these measures established governance for Puerto Rico and Cuba, they did not fully settle the debate over U.S. policy in these territories. The limitations imposed by the Foraker Act and Platt Amendment sparked discussions about colonialism, sovereignty, and U.S. imperialism.