I believe the answer is: Ego
According to Freud, Human's ego could give both positive and negative impact. The negative one is it often give a false sense of pride that make us arrogant, the positive one is that it make help us to maintain our core principles (such us choosing not to skip homework)
The correct answer to this is Epicureanism: this philosophy was based on the teachings of Epicurus, who believed that the greatest aim and the biggest pleasure is happiness. His way of achieving happiness was through knowledge and modesty - this would liberate one from fear.
Faster transportation, Easier means of trade, and easier trade.
ADHD is more of problem with attention management and hyperactivity. Children are not able to control their behavior. Whereas, oppositional, they act impulsively. According to sources, the most probable answer to this query is that this type of neurodevelopmental disorder is more observed in children that in adults. Thank you for your question. Please don't hesitate to ask in Brainly your queries.