Caging is a practice used in the field of animal research and wildlife management. It involves placing animals in enclosures or cages for various purposes, such as studying their behavior, health, or reproduction. This method allows researchers to observe animals in a controlled environment while minimizing external variables. In the context of politics, caging can refer to a controversial tactic used to identify and challenge the eligibility of voters. This process involves sending mail to registered voters and using returned mail as a basis to question their registration status. Critics argue that it can disproportionately affect certain groups, leading to disenfranchisement.