Which of the following is NOT a ridge characteristic of fingerprints?

In the context of fingerprint analysis, ridge characteristics are essential for identifying and classifying fingerprints. The correct answer indicates a term that does not represent a specific ridge characteristic commonly studied in forensic science.

The term "island" refers to a type of minutiae, which is a specific detail in the fingerprint's ridge pattern. Minutiae itself encompasses various ridge characteristics, including specific points where ridges end or bifurcate.

A "core" is the central point of a fingerprint pattern and is considered a key ridge characteristic that aids in the classification of fingerprints. It is commonly found in loops and whorls, which are two major fingerprint patterns.

A "delta" is another significant ridge characteristic represented in fingerprints, often identified in loop and whorl patterns as well, typically defined as the point where ridges converge or diverge.

In contrast, "island" is generally not classified as a distinct ridge characteristic in standard fingerprint analysis terminology. While it may describe a specific configuration of ridges, it does not hold the same status or recognition as the core, delta, or minutiae. Therefore, it is the term that stands out as not fitting within the main established categories of ridge characteristics commonly utilized in forensic fingerprint analysis.