Final answer:
For sentences six and seven, using a conjunction to create a compound sentence is often the most effective way to combine them, provided that the context of these sentences supports such a combination.
Step-by-step explanation:
The most effective way to combine sentences six and seven would depend on the context provided by the sentences themselves. If the sentences are closely related and can provide a richer meaning when combined, the best option is typically to use a conjunction to join them. This creates a compound sentence where both parts retain equal importance, and you can use coordinating conjunctions such as for, and, nor, but, or, yet, or so to accomplish this.
When combining sentences for nuance and effectiveness, always consider whether the new sentence construction enhances the clarity and flow of your narrative. Be cautious not to create run-on sentences, and revise as necessary to maintain proper sentence structure and punctuation to support your revised sentences.