<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>
Iron and Nickel.
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Answer:
Drought- A prolonged period of abnormally low rainfall, leading to a shortage of water.
Desertification- The process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture.
Explanation:
