An isthmus is best described as which of the following?

• A. Narrow strip of land connecting two larger land.
• B. Long, narrow inlet of the sea with steep cliffs on each side.
• C. Narrow waterway connecting two larger bodies of water.
• D. Low plain built up by mud deposited at the mouth of a river.

Answer: (A)

An isthmus is a narrow strip of land that connects two larger landmasses and separates two bodies of water. This land bridge allows travel and land-based connections between the bigger regions while water lies on both sides. The other descriptions point to different features: a fjord is a long, narrow sea inlet with steep cliffs; a strait or channel is a waterway linking bodies of water between lands; and a delta is a low plain formed by sediment at a river’s mouth. The land-connecting nature of an isthmus is what makes it the best match.