Which sentence structure is formed by two or more simple sentences joined by conjunctions?

The correct answer is that a compound sentence is formed by two or more simple sentences joined by conjunctions. A compound sentence combines independent clauses using coordinating conjunctions such as "and," "but," or "or." This structure allows the writer to connect related thoughts and present them in a cohesive manner.

For example, the sentences "I enjoy reading" and "I like to write" can be joined to form the compound sentence "I enjoy reading, and I like to write." This structure enhances the flow of ideas and provides a rhythm to the writing.

In contrast, a complex sentence contains an independent clause and at least one dependent clause, a simple sentence contains only one independent clause, and sibilance refers to the repetition of 's' sounds in a phrase, which is a stylistic device rather than a sentence structure. Thus, compound sentences stand out due to their combination of different simple sentences through conjunctions, creating more elaborate and connected expressions.