The Aztecs were extremely warlike, their entire empire centered around war, and they were settled in a swampy island in Lake Texcoco, in what is today central Mexico. They also built temples.
The Incas had a centralized government and their civilization was centered around religion, so they built many temples. The Incas were also chose diplomacy before war, but if the people they were bargaining with refused the offer, they would use force to get what they wanted.
I'm not really sure what they mean by North American and South America, but I hope the information I gave above helps at least a little. If it does, could you mark it brainliest? :)
Some limitations when determining the cause of an event are that other sources that are linked to the event in the same time can usually say things different; It is especially difficult if there is no solid base to the cause and no photographic or written evidence.
