So that the most important details are read last and therefore are remembered the best, leaving a lasting impression on the reader.
Yes I believe it’s 4 explain for the others to see in understand
They used a counter attack on the pearl harbor from the rear because they thought no one would be looking at the rear of the vessel so hey went to the rear and they added a wooden propeller base for shallow waters because the torpedo they was using was for deep water and their plains were faster than what the us had.