Answer:
Mexico.
Explanation:
Present-day Mexico was the geographic environment where the Olmec, the Maya and the Aztec civilizations were born and developed, reaching power, influence and expanded. Each of them also made great cultural contributions such as calendars, the concept of zero in mathematics, astronomic observations, agricultural techniques, splendid architecture, etc.
Answer:
fleas
Explanation:
Like the modern bubonic plague, scientists believe the Plague of Justinian spread through fleas. Studies indicate the plague may have originated in China or India and was then transported to the fertile valleys of Egypt through trade routes.
Answer:
The French gave their support to another tribe during war
It allowed the soil in the field to regain it nutrients
