The four main types of macromolecules are organic. what does organic
mean in this context?
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a. it is a very large molecule.
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b. it is produced without the use of pesticides.
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c. it is made from or produced by a living organism.
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d. it is made only of carbon.

Organic  means it is made only of carbon.

Explanation:

The all four types of macromolecule are organic means these all four type of macromolecule made up of carbon. These four macro molecules are carbohydrate, protein, nucleic acid and Proteins.  All are essential cell component perform a wide array of function.

Biological macromolecule is organic so they contain carbon. A part of carbon they contain nitrogen, hydrogen and additional minor element.   Enzymes and some hormone are example of protein.

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