+**Alertness** is a state of keen [Awareness](/wiki/awareness) and readiness to respond to stimuli. It involves a heightened [State of Mind](/wiki/state_of_mind), crucial for perception and reaction. This active vigilance allows an organism to process information effectively and navigate its environment.
+## See also
+- [Attention](/wiki/attention)
+- [Vigilance](/wiki/vigilance)
+- [Sleep](/wiki/sleep)
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