A crosscutting concept is one that has applications in different branches of science.
The ones we have in the answer options are the following:
• Structure and Function,, which says that the ,shape, of an object gives it certain, properties and functions.
• Scale, proportion, and quantity,, which refer to what is important when studying something can be affected by the scale of it, as well as to the proportional relationships between quantities when the scale changes.
• Energy and Matter,, regarding the tracking of changes and flow of energy and matter in a system.
• Stability and Change,, which tells us that every system has conditions that affect its stability, and these need to be considered.
In the question, they are talking about how the order of the nucleotides in the DNA determines the amino acids of a protein, and thus its shape and chemical properties, which determine the function that the protein has.
This means it refers to the cross-cutting concept of structure and function, so the right answer would be A.