What constitutes a Warning in tournament play?

The correct answer pertains to the definition of a Warning in the context of tournament play within the Magic: The Gathering (MTG) judging framework. A Warning serves as an officially tracked penalty that addresses minor infractions that occur during a match. It is a formal acknowledgment that a player has violated a rule or guideline, but it does not carry severe consequences that more significant infractions would entail.

Warnings are an essential aspect of maintaining the integrity of the game, as they provide players with an understanding of what is acceptable conduct without resorting to harsher penalties. This approach encourages players to adhere to the rules while allowing them the opportunity to rectify any issues in subsequent games.

The other options do not accurately reflect the meaning or significance of a Warning in tournament settings. An informal reminder is less formal and does not have an official tracking component. Resolving gameplay disputes typically involves mediation rather than issuing penalties, and a notification of disqualification indicates a much more severe consequence than a simple Warning. Thus, B distinctly captures the essence of what a Warning represents in the IPG framework.