Homogeneous region is a region where the people are similar. The answer to your question will be whichever one mentions people being the same.
United States control of Puerto Rico’s government with Puerto Ricans
becoming U.S. citizens after 1917; the Philippines providing a naval
base to guard U.S. trade in Asia, which in turn provided some
improvement in Filipino schools, roads, and healthcare.
The executive branch carries out and enforces laws. It includes the president, vice president, the Cabinet, executive departments, independent agencies, and other boards, commissions, and committees. American citizens have the right to vote for the president and vice president through free, confidential ballots.