Examine the U-shaped body of water in the image. What's this body of water called?

Based on the image provided, the U-shaped body of water shown is called an oxbow lake. An oxbow lake is a curved or crescent-shaped body of water that forms when a meandering river or stream cuts off a meander bend, creating a U-shaped or horseshoe-shaped lake. Over time, the river's flow erodes the narrow neck of land between the meander bend and the main channel, causing the meander to be cut off from the main river channel. This results in the formation of a separate, isolated body of water known as an oxbow lake.

Option A, a kettle lake, refers to a type of lake formed by the melting of a large block of ice left behind by a retreating glacier. Option B, a defta, is not a recognized term for a body of water. Option C, a meander, refers to a winding curve or bend in a river or stream. While oxbow lakes are formed by meandering rivers, the specific body of water in the image is an oxbow lake, not just a meander.

Therefore, the correct answer is D, an oxbow lake.