Answer:
D) Peninsula
Step-by-step explanation:
Jamestown was built on a peninsula beside a river they named the "James River," which served to isolate the settlement and deter potential invaders. All of the ships were able to navigate the river because of its depth.
They had to move from an island to a peninsula because there were too many bugs and not enough sources of fresh water.
A peninsula is like an island, but it is connected to the mainland for about a quarter of its length. The freshwater is all around the other 3/4 of the peninsula.