Question

flat, gently rolling land *
choose
isthmus
plain
mountains
hills
plateau
than a continent that is completely surrounded by * 2 points
a piece of land that extends outward from a continent and is surrounded by water on three sides
choose
a narrow piece of land that connects two large landmasses *

Explanation:

A plain is characterized as flat or gently rolling land. This is a fundamental geographical definition.

Answer:

Plain