hook / spur\nisland / dot\nridge ending\nbifurcation / fork\nshort ridge\nlake\ncrossover\ndelta

Brief Explanations:

The image displays a fingerprint pattern characterized by ridges that enter from one side, curve around, and exit on the same side. This specific pattern is known as a loop. In the center of the loop, there is a triangular-shaped area where the ridge lines diverge in three directions. In dactyloscopy (the study of fingerprints), this specific ridge characteristic or minutiae point is called a delta. The delta is a crucial landmark used for the classification and identification of fingerprint patterns.

Answer:

delta