The imprint of a fingerprint consists of natural secretions of the sweat glands that are present where

Explanation:

the sweat glands are located in the hand & fingers,armpits,neck 4head, ...& feet, In fact, certain parts. of the body sectete oils,(lipids), oils..

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.