When Coach Kwan notices that a player is getting tired, she takes out the tired player and substitutes a fresh player. Which type of chemical reaction does this best model?

In a replacement reaction, one substance takes the place of another. Coach Kwan removes the tired player and puts a fresh player in that player's spot, which models replacement. Decomposition breaks something into smaller parts, synthesis combines substances, and oxidation involves loss of electrons or reaction with oxygen.

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