The game "whack-a-mole", in which the player must "whack" randomly appearing moles with a hammer as quickly as possible when they peek their heads out, is best described as a task.

reaction time

Explanation:

According to my research on studies conducted by various neurologists, I can say that based on the information provided within the question this game best describes the reaction time task. This is the amount of time it takes for your brain to process the visual information and for your body to react accordingly. This is because the toy moles only pop their heads out for an extremely small amount of time in which you have to hit them with the hammer before they go back down.

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