Answer: B. increased tax revenue
Explanation:
There might not be enough oxygen for us to survive. As the plants and animals circulate the flow of oxygen and carbon, it wouldn’t be enough. Say you were trapped in a vacuum (not the one you use to clean your house). You would have only enough oxygen in your lungs to last you for a little while, but then there is too much carbon in the air that we exhale. Plants and animals use that carbon to release oxygen. So, without them, earth would be filled with carbon
Answer:
B.
Developing agricultural systems abroad is important because the land in other countries is similar to the land in the United States.
Explanation:
