Whorl patterns are defined by what feature?

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Multiple Choice

Whorl patterns are defined by what feature?

Explanation:
In fingerprint patterns, a delta is the point where ridge lines diverge and converge to form a triangular area. Whorl patterns are defined by having two or more such deltas, often with a circular or spiral ridge flow around a central area. This criterion sets whorls apart from loops, which have only one delta, and arches, which lack deltas entirely. So the defining feature of whorls is the presence of two or more deltas.

In fingerprint patterns, a delta is the point where ridge lines diverge and converge to form a triangular area. Whorl patterns are defined by having two or more such deltas, often with a circular or spiral ridge flow around a central area. This criterion sets whorls apart from loops, which have only one delta, and arches, which lack deltas entirely. So the defining feature of whorls is the presence of two or more deltas.

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