Final answer:
The dependent clause in the sentence is 'because I am on a diet.'
Step-by-step explanation:
The Dependent Clause in the Sentence:
The dependent clause in the sentence "I want Taco Bell for dinner, but I shouldn't eat too much fast food because I am on a diet" is because I am on a diet. A dependent clause is a group of words that contains a subject and a verb but cannot stand alone as a complete sentence. It depends on an independent clause to form a complete thought.
Example:
In this sentence, the independent clause is "I want Taco Bell for dinner" whereas the dependent clause is "because I am on a diet." The dependent clause provides the reason why the speaker shouldn't eat too much fast food.
Learn more about Identifying dependent clauses