Question

who is the head of government in puerto rico?
the governor
a panel of elected officials
the president of the united states

Explanation:

Puerto Rico is a territory of the United States, and its head of government is the governor, who is elected by the people of Puerto Rico. A panel of elected officials is not the head of government, and the president of the United States is the head of the US federal government, not the head of Puerto Rico's government.

Answer:

the governor