Answer:
D). Because I care about the fate of the planet, I choose to recycle.
Step-by-step explanation:
An adverbial phrase is defined as the clause that comprises of a subject followed by a predicate and functions as an adverb in the sentence that modifies the verb, adjective, etc. However, such clauses remain dependent on the principal clause to accomplish its meaning.
As per the question, option D displays the statement which involves an adverbial clause 'Because I care about the fate of the planet'(that is functioning as an adverb to modify the verb 'chose') followed by the independent clause 'I choose to recycle' which is complete in itself to convey the intended meaning and also accomplishes the meaning of the adverbial clause. Therefore, option D is the correct answer.