What does the term "game state" refer to in a Magic match?

The term "game state" in a Magic match refers to the current conditions and status of the game. This encompasses all relevant aspects of the game at any given moment, including the life totals of each player, the cards in their hands, the permanents they control, the cards in their graveyards, and any other pertinent information that affects gameplay. Understanding the game state is crucial for making informed strategic decisions during a match, as it provides the context within which all actions occur.

The other options focus on specific elements of the game rather than the overall conditions. While life totals and colors of cards being played are part of the game state, they do not encompass the full picture. Similarly, the total number of cards in a player's library and the number of turns remaining are just individual components that contribute to the game state, but do not define it in its entirety.