Simple. The Columbian Exchange exchanged diseased, people, plants, food, and animals. The Americas adapted with new plants and animals like cattle, chicken, etc., and more slaves. Europe gained potatoes, tomatoes, corn, squash, punpkin, etc.
New societies could depend on new sources of food, new animals. That also improved their local economy, and knowledge (learning)
The u.s new an attack was coming but they didn't know when, as a result they were unprepared and lost a lot of their stuff
Networking is basically getting to know your peers/colleagues. It is useful because if you know someone well, you can work better with them.
