Answer:
A compound declarative Sentence.
Step-by-step explanation:
A declarative sentence is the most basic kind of sentence in English Language. This kind of sentence makes a statement, gives an explanation or passes across an information.
A compound declarative sentence is one that is not just a simple phrase but a group of phases joined together often separated with conjunctions such as and, but and a comma.
The sentence; "Other small stores lined both sides of the street for the next few blocks, and Chris quickly scanned the names on the storefronts nearby" is a compound declarative sentence because it makes a statement, gives a description and is separated by a comma and the conjunction "and".