The best answer to complete the sentence correctly is impulse.
Impulse is a sudden desire to react or do something as a result of that urge. It also serves as a motivation to complete a desirable activity. It is usually used when things come unexpectedly.
Answer: The difference between a compound sentence and complex sentence is that a compound sentence has two independent clauses and a complex sentence has one independent clause and one dependent clause
You could use both as long as you use them correctly
Hemingway was driving an ambulance in Italy not because he had been injured or because he was a doctor, but because he was assisting the Red Cross on the Italian front.
Hemingway first served in World War I and later lived in Paris. He also wrote A Farewell to Arms after the war and drew on his personal experiences to do so. Finally, he retired to Key West.
Hemingway's writing style was anything but commonplace or boring. In fact, it was the lack of wordiness and the creative succintless that made Hemingway's works so popular.
