Answer :
Final answer:
The correct combination of the two sentences appropriately uses the coordinating conjunction 'so' to link the Wright Brothers' dream of flying with their consequent action of deciding to invent the airplane.
Explanation:
The best way to combine sentence 6 and sentence 7 would be to use a coordinating conjunction that clearly shows the causation between the dreams of the Wright Brothers and their decision to act upon those dreams. The appropriate sentence combination, therefore, would be: "For instance, the Wright Brothers dreamed of being able to fly, so they decided to invent the airplane." This combination uses the coordinating conjunction 'so' to show the result or the outcome of their dream, which is their decision to invent something that would allow them to achieve it.
The last one, “For instance, the wright brothers dreamed of being able to fly, so they invented the airplane.”