an area or a spot in a drawing, painting, or photograph that is strongly illuminate or an especially significant or interesting detail or event.
Answer:
This is called micro tones. They can blend and either sound like cracking on purpose, or a riff.
Answer:
That is definitely considered plagiarism.
Explanation:
Your teacher could find the picture if they know how to trace where it originally came from since this is the internet.
I don't recommend doing so due to how much trouble and conflict it would inflict on you. Stay safe though :)