Identify the unconditioned stimulus, Five year old Ethan is watching a thunderstorm from his window. A huge bolt of lightning is followed by a tremendous thunderclap, and Ethan jumps at the noise. This happens several more times. There is a brief lull and then another lightning bolt. Ethan jumps in response to the bolt.

Sounds of Thunder

Explanation: Unconditioned stimulus are events which naturally or unconditionally triggers a response that wasn't pre-determined. In the scenario above, Ethan jumps at the noise of the thunder, here Ethan's response was not pre-determined and was only triggered by the noise of the thunder. Therefore, The Thunderclap is the Unconditioned stimulus.

Ethan's jump in response to the lightning bolt is a conditioned response as he braved for the noise of the thunder which he expects to follow after the lightning.

answer; ///i believe the correct answer is the empire state building;