The watchman did not recognize the smoke as a new fire. The watchman sent out a signal to the wrong fire station. The first fire
fighters to arrive on the scene had only limited waterpower. The second alarm was signaled incorrectly, so additional engines were delayed. Based on the list of supporting details, what is the central idea of the selection? The firefighters were not skilled enough to put out the fire. The watchman was new to this job. The fire might have been extinguished sooner if several mistakes had not been made. The fire stations were not located in central areas.
If you read the main idea you can come to the conclusion that the firefighters made mistakes that couldve prevented the fire if they hadnt made the mistakes
"Imperialism is a policy or ideology of extending a country's rule over foreign nations, often by military force or by gaining political and economic control of other areas."