The diagram shows the structural formula for starch.

Which of the following explains why starch is a polymer?

Responses

repetitive combination of simple subunits

repetitive combination of simple subunits

organic compound molecule

organic compound molecule

high mobility as a result of its long length

high mobility as a result of its long length

contains carbon-based functional groups

The first response, "repetitive combination of simple subunits," explains why starch is a polymer.