What type of fingerprint evidence is visible to the naked eye and left behind when a finger leaves an indention?

The correct answer is that plastic fingerprint evidence is visible to the naked eye and forms when a finger leaves an indention in a soft material, such as wax, clay, or similar substances. This type of fingerprint can be directly observed and does not require any special processing to be seen, which differentiates it from other forms of fingerprint evidence.

Latent fingerprint evidence, on the other hand, consists of hidden or invisible prints that must be developed using powders or chemicals to become visible. Patent fingerprint evidence refers to prints that are left in a visible medium, such as ink or blood, but are not typically formed by an indention in a surface. Impression evidence is a broader category that includes any mark or imprint left by an object, which can encompass fingerprints but is not specifically limited to them.

Thus, plastic fingerprint evidence's unique characteristic of being a physical impression that can be seen without any enhancement makes it the correct choice in this scenario.