What is $DNA$ fingerprinting? Mention its application.

(N/A) $DNA$ fingerprinting is a technique used to identify and analyze the variations in various individuals at the level of $DNA$. It is based on the principle of $DNA$ polymorphism.
Applications:
$1$. It is used in forensic science to identify potential crime suspects.
$2$. It is used to establish paternity and resolve family relationship disputes.
$3$. It is used to identify and protect commercial varieties of crops and livestock.
$4$. It is used to study the evolutionary history of organisms and trace linkages between different groups.