Final answer:
The sentence 'Do you want to ride bikes or roller skate?' is a compound sentence because it presents two options connected by the coordinating conjunction 'or' and has no dependent clauses. Thus, the correct option is b) Compound.
Step-by-step explanation:
The sentence, "Do you want to ride bikes or roller skate?" is a type of sentence that can be categorized based on its structure. To determine the type of sentence it is, we need to understand the different sentence structures. A simple sentence contains only one independent clause. A compound sentence contains two or more independent clauses joined by coordinating conjunctions or semicolons. A complex sentence contains an independent clause and at least one dependent or subordinate clause. A compound-complex sentence contains two or more independent clauses and one or more dependent clauses.
The sentence in question does not have any dependent clauses; rather, it presents two options connected by the coordinating conjunction 'or.' Therefore, there are no subordinate clauses that would make it a complex or compound-complex sentence. This structure indicates that the sentence is simply presenting two parallel activities for the recipient to choose from in question form.
Taking this into account, the correct option for the type of sentence being asked about is: b) Compound.