Padre Island is the world’s longest…

A Coral island
B Barrier island
C River island

At 113 miles long and less than 3 miles wide, Padre Island is the longest barrier island in the world. The island was split into two parts when the Port Mansfield Channel was built in the early ’60s, forming South Padre Island, pictured here, and North Padre Island.

The correct answer is Barrier island.