Look at the map. Which ecosystems show where early civilizations developed because the area allowed people to grow crops even during times with little rainfall? Select all that apply.
-Desert
-RainForest
-Savanna
-sahel
Desert and Sahel
The ecosystems that show where early civilizations developed because the area allowed people to grow crops even during times with little rainfall are the Desert and the Savanna.
To determine which ecosystems show where early civilizations developed because the area allowed people to grow crops even during times with little rainfall, we need to assess the characteristics of each ecosystem option and their relationship with agriculture.
1. Desert: Deserts generally receive very little rainfall, making it challenging for agriculture without adequate water sources such as rivers or underground aquifers. Therefore, deserts are not typically ideal for sustained farming and would not be a suitable answer for this question.
2. Rainforest: Rainforests receive high levels of rainfall throughout the year, so they do not experience prolonged periods of little rainfall. Consequently, rainforests are not generally associated with arid conditions required for early agriculture.
3. Savanna: Savannas are characterized by a mixture of grassland and scattered trees, typically experiencing a pronounced dry season and varying amounts of rainfall throughout the year. The availability of water during these periods of little rainfall can allow for agricultural practices. Therefore, savannas could be a suitable answer for this question.
4. Sahel: The Sahel region, located between the Sahara Desert and the savannas of Africa, experiences semi-arid conditions with irregular rainfall patterns. While the region can be challenging for agriculture due to limited and unpredictable rainfall, it has historically hosted early civilizations that developed techniques to adapt to the conditions, including practices like rainwater harvesting, drought-resistant crops, and pastoralism. Therefore, the Sahel can be considered a correct answer for this question.
Based on the analysis, the ecosystems that show where early civilizations developed because the area allowed people to grow crops even during times with little rainfall are the savanna and the Sahel.