Explain why South America , Australia, North Africa and Central Asia may be unsuitable for agriculture

Because those areas are mountaineous which doesn't support agriculture.Those areas are desert areas also.

Explanation:

Goodluck :]

your answer would be just capitalism.

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.