What is the difference between an isthmus and a strait?
a. a strait is a body of land that creates a bridge over a large body of water, and an isthmus is the place a body of water originates
.b. a strait is an area of higher ground separating river systems that flow in opposite directions, and an isthmus is land surrounded by water on three sides.
c. an isthmus is a thin strip of land that connects two larger areas of land, and strait is a narrow body of water connecting two larger bodies of water
.d. an isthmus is opening of a river, and a strait is a sloping mound of earth.