The document discusses strategies for combining sentences, including using conjunctions like "and" and "but" to join two related ideas into a compound sentence. It provides examples of combining sentences about wetlands, salt marshes, and various animals. The key strategies are using conjunctions to link independent clauses, rearranging clauses and ideas to create a smoother flow, and ensuring the combined sentences do not become run-on sentences. Practice combining sentences is recommended to improve this skill.