Match each region with the agricultural innovations that characterize it.
a. east asia
b. southwest asia
c. mesoamerica
d. saharan afric1. people of this region domesticated sorghum, but environmental change forced them to migrate to new regions, bringing their agricultural ideas with them. (saharan africa)
2. people domesticated rice and millet in the extensive fertile river valleys of this region. (east asia)
3. people in this region developed maize (corn), and used it in combination with beans and potatoes to provide both a balanced diet and sustainably productive soils. (mesoamerica)
4. people in this region were the earliest domesticators of plants, and they also domesticated goats, sheep, pigs, cattle, and camels. (southwest asia)

The answers are

-East Asia   They domesticated rice and millet in the  this region.   

Southwest Asia- They were the some of the first ones to domesticate plants, and also goats, sheep, pigs, cattle, and camels.

Mesoamerica- They cultivated maize (corn), beans and potatoes to provide productive soils.

Saharan Africa- They domesticated sorghum, but when environmental change forced them to move, they brought their agricultural ideas with them.    

Explanation:            

1-  East Asian people  domesticated rice, swine, and chickens.  

2-Southwest Asian people domesticated the yak, horse some species of goat and sheep.

3-Corn became a major food source in Meso-America

4  Although maize, sorghum and millet are widespread, root crops such as yams and cassava are more important.