Answer: Summer rainy season
Explanation:
When rain came in the summer it led to floods in both the Nile and the Tigris and Euphrates. These floods brought fertile silt for growing crops and was the reason the ancient civilizations of Egypt and Mesopotamia were able to take hold.
Most of these areas that rely on floods do not have much in the way of rain in their region for instance Egypt. So when the summer rains come and flood the rivers further upstream, they benefit from it as the planting season will have fertile soils.
<span>A. practical scientific experimentation.
</span><span>The Age of Enlightenment or also called, Age of Reason or Enlightenment that began around 1620s to about 1780s. In this era of enlightenment, the people used reason, logic and individualism to reform the societal foundations and government. Many things happened during the enlightenment period but the choice is the best according to the responder than the rest of the given. This occurence involved and included the people, philosophers, government officials setting towards a more foundation analysis based on thought and intention rather than plain order and traditional authority. </span>
18. Berlin because not only was it a competition for the Soviet Marshalls Konev and Zhukuv but it was also a peace treaty made.
19. Finland & Norway
20. Sweden & Switzerland.
