Starch is a polymer because it contains a repetitive combination of simple subunits.
Starch is a macromolecule that is made up of glucose subunits. Thus it can be broken down into its subunits using relevant chemical processes.
Molecules that are made up of simpler subunits linked together by chemical bonds are known as polymers.
Apart from starch, other examples of polymers include proteins, DNA, RNA, etc.
More on polymers can be found here: https://brainly.com/question/17638582?referrer=searchResults
