The correct answer should be
<span>c. They developed in almost total isolation from the rest of the world
Only in the new century was it made possible to discover them when shipping became developed enough to allow people to cross into the new continent. They developed isolated from everyone and only ever met other American tribes from time to time.</span>
Matrilineal. In Latin, the root word matri- refers to the mother.
Quite simple: a region is the geographical zone where people lived and/or particular events took place. A period is the chronological segment of linear history (timeline) where such people lived and/or the event took place. For example, the Crusades took place in the Middle East while the period is the Middle Ages.
Answer:
Executive! hopefully this helps!