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In simple harmonic motion, the restoring force must be proportional to the:
Odorants
Chemicals that are detected by the olfactory system, leading to the perception of smell.
Pheromones
Chemical substances produced and released into the environment by animals, affecting the behavior or physiology of others of its species.
Menstrual Cycles
The regular natural change that occurs in the female reproductive system that makes pregnancy possible, typically a 28-day cycle.
Tastants
Chemical compounds that stimulate the taste receptors on the tongue.
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