The subordinate clause in the sentence is option D: whereas Gordon preferred to play baseball.
A subordinaye clause is one which do not form a complete sentence, it depends on the other part of the sentence to have a total sense.
A subordinate clause, also known as a dependent clause, will begin with a subordinate conjunction or a relative pronoun and will contain both a subject and a verb.
In this case the word whereas indicates that it is a subordinate clause since it is a subordinate conjunctions.
The speaker's employment of figurative language produces the idea that love is feeling sheltered, and not something that you can just dispose of. In the third stanza, the poet conveys his idea that loves warmth makes you feel protected by the use of a metaphor
You should do your homework so that you understand the subject taught in class. If you don't do your homework, your grades will drop and you will not receive a good grade in the class.