In which situation might a player receive a red card?

A player can receive a red card in various situations, and one of the most common scenarios is receiving a second yellow card during the match. When a player accumulates two yellow cards, the referee issues a red card as a consequence. The first yellow card serves as a caution, and receiving a second indicates a more serious infraction or multiple infractions that are detrimental to the match.

The other situations listed do not typically result in a red card. Minor fouls would usually warrant a free kick and possibly a yellow card, but not a red card. Leaving the field of play, unless done for unsporting reasons or without permission, generally does not lead to a red card either. Unsporting behavior might prompt a direct red card if it is deemed sufficiently severe, but it's the accumulation of two yellow cards that directly leads to a red card.