The answer you are looking for is B.Oil
Answer:
(D) None of the above is true
Explanation:
One problem with constructing a perfectly complete realistic economic model is that none of the above is true. Therefore, it would be far too complicated to analyze, it would be too simplistic to have any value, and politicians see little value in such a model are all FALSE.
Answer:
a person who farms or works on a ranch, especially in the southwestern US and Mexico.
Explanation:
These animals were raised in a controlled environment. Many plants are unable to survive in such a harsh environment. Heredity and environment are both important. Pollution is bad for the environment