Final answer:
El Salvador is the country with the islands of Meanguera and Meanguerita in the Gulf of Fonseca.
Step-by-step explanation:
The country that has the islands of Meanguera and Meanguerita in the Gulf of Fonseca is El Salvador. These islands are part of a tri-national gulf shared between Honduras, Nicaragua, and El Salvador on the Pacific Coast in Central America. While there are several small islands within the gulf, Meanguera and Meanguerita are specifically associated with El Salvador.