Either c or d and it needs to be 20 characters so here
Answer:
Proteins are a class of macromolecules that perform a diverse range of functions for the cell. They help in metabolism by providing structural support and by acting as enzymes, carriers, or hormones. The building blocks of proteins (monomers) are amino acids
Explanation:
Answer
Practices that can support a circular economy are;
• Ensuring there is high efficiency in use of available resources
• Cutting down the wastes production
• Practicing maximum recycling of wastes
• Using other business models such as focusing on changing consumer behaviors
Explanation
A circular economy is one that focuses more on changing the consumer behavior of using activities that consumes the scarce resourcesto developing a design from waste system which will have positive outcomes to the society. For example , moving towards embracing renewable energy resources through keeping goods and material in use, continuous generation of natural systems and designing out wastes and pollution.
A. Remain without change over time
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