Answer: All known historical and modern economies are examples of mixed economies, though some economists have critiqued the economic effects of various forms of mixed economy.
Explanation:
In the United States of America, you must at least 18 years of age to vote.
_______________________________________________
<span>It's is the second one. The waste materials generated by one organism are often reused by other organisms.Mass, or matter, is conserved in all physical and chemical changes. Matter is not created or destroyed within ecosystems, it only undergoes physical or chemical changes. One example of this process is that the waste materials generated by one organism are often reused by other organisms as food or nutrients.</span>
