Can somebody please give me an example of a Macromolecule before and after an environmental change? Please include its function and structure images too! I have this down here for reference!!

Individual macromolecules in coal structure are bonded to each other by a variety of forces and bonds to form a solid, three-dimensional coal structure. Aromatic clusters are linked by connecting bonds through oxygen, methylene or longer aliphatic groups, or disulfide bridges. The proportions of the various functional groups change with rank. Acid groups decrease early in the rank progression and other groups follow, leaving ether groups to act as cross-linking groups. Another type of linkage involves hydrogen bonds that, for example, hold hydroxy and keto groups together in solids.

Explanation: