Respuesta :
The sentence that features an introductory clause is 4. Because she took her eyes off the road to answer the phone call, Jayla lost control of her car and crashed through the front of Kayla’s house.
An introductory clause is a dependent clause and functions as a statement that clarifies or qualifies the idea that is present in the main clause. A comma should always be used after the introductory clause to separate it from the main clause. In this sentence, the introductory clause explains the reason for what happens in the main clause.