<span>The rolling back of eyes is a sign our body gives us that it is now the time to relax. When a person faints, becomes unconscious or experiences extreme pleasure, the human nervous system sends out some signals which force the body shut down certain body parts to focus on pleasurable sensation. This happens to your eyes too, when our eye muscles completely relax and they roll out.</span>
In green revolution, the processed increasing their production, increasing crop yields, more industrialized agriculture.
Thus, the answer to the question is the following:
C. Increased greenhouse gas emissions
D. Increased use of pesticides
The item A. increase in food prices and B. Decreased productivity are EXCLUDED in the answers.
15) C
USA's population is 306,800,000
Canada's population is 33,700,000
16) D
Both of the countries have about the same age groups.
Llanos would be the correct answer.
