Both sides of the trade became very wealthy as much trade does but slaves were being transferred which is obviously bad other than that the only things being transferred were materials and non native foods. hope this helps!
The imrpoved agricultural techniques, such as the three field system, the climate change, and the horse plows. These effected Western Europe during the middle ages because the three field system produced better crops, the climate opened more land to farming, and the horse plows allowed faster harvesting. This made life a lot easier for farmers.
I will have to go with true on that one.
In order to truly understand an event - whether personal or historical - it is necessary to look at it from multiple perspectives.
Just like you cannot understand history from just one book, you need to ask multiple persons to help you with your personal event.