Answer:
The sentence in the paragraph that is structured differently than the others is:
sentence 4.
Step-by-step explanation:
The difference between sentence 4 and the others is the sequence of clauses. Sentences 1, 2, and 3 all start with the main clause, which consists of a subject and a predicate, and which is able to stand alone as a sentence and convey a full meaning. Then, their main clauses are followed by either a coordinate clause or a subordinate clause, which begin with conjunctions (and, yet, so, etc.)
On the other hand, sentence 4 begins with the subordinate clause. We can identify it since it uses the subordinating conjunction "because". This clause is then followed by the main clause. As we can see, sentence 4 inverts the structure.