While studying for a test, Elan compared the characteristics of different elements. He listed these characteristics that are shared by two elements:a major element of the human bodya fundamental building block of molecules Which elements did Elan compare?

Oxygen and carbon are both major elements in the human body, and both are fundamental building blocks of molecules. Carbon forms the framework of many biological molecules, while oxygen is found in water and many other molecules. Iron, zinc, and copper are important elements too, but they are not both major body elements and fundamental molecular building blocks in the same way.

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