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•Steve Jobs creating apple created one of the most successful smartphone brands.
•Bill Gates creating Microsoft richest man in the world until Jeff Bezos.
•Jeff Bezos creating Amazon currently richest man in the world.
These are just a few examples.
I think the bolded words would be "whom Mr. Stein chose". The clause whom Mr. Stein chose is an example of an adjective because the clause describes the word student. Student is the subject of the sentence and is a noun. An adjective describes a noun or another subject. an adverb describes a verb or another adverb.
Anne Sullivan, while describing her struggle to work with a young Helen Keller, wrote, "...the more I think, the more certain I am that obedience is the gateway through which knowledge, yes, and love, too, enters the mind of the child."