Study the diagram of the villus below. label 1 to 7 ​

lysosomes contain a variety of enzymes, enabling the cell to break down various biomolecules it engulfs, including peptides, nucleic acids, carbohydrates, and lipids (lysosomal lipase). the enzymes responsible for this hydrolysis require an acidic environment for optimal activity. hope i !

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i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"