While waiting for the school bus, it begins to rain. This is an example of:


Voluntary Response

Involuntary Response

External Stimulus

Internal Stimulus

Respuesta :

external stimulus. The rain is something out of your control while you're waiting. Rain is not something you are doing nor is it a response to you waiting for the bus.
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External Stimulus is the correct answer because you can not help it if it starts to rain that is an example of mother nature