Answer: Post-traumatic stress disorder
Explanation:
Post-traumatic stress disorder (PTSD) is a mental disorder which occurs due to an individual witnessing or being exposed to a fearful or dangerous events or traumas which with time causes such individual to develop symptoms of post-traumatic stress disorder such as difficulty in sleeping due to nightmares,lack of concentration, occasionally on guard, irritations etc.
Here, Pukari suffers Post-traumatic stress disorder as a result of the fearful experience he witnessed in the killing of his wife and children and so has developed symptoms of the disorder such as lack of concentration due to recurring flashbacks causing him have difficulties at work.
It allowed us to be able to trade and get different things that we were not able to get in America.
The warship guarantees Japanese interest in trading with united states due to the projected sense of security. This allowed united states to possess unique commodities that we never possessed before such as Slik and porcelain.
Hope it helps you
Please mark as brainliest