* Starch is a polymer of glucose. Glucose itself is a sugar with the molecular formula C6H12O6. It consists of carbon, hydrogen, and oxygen atoms held together by covalent bonds.

* Covalent bonds involve the sharing of electrons between atoms. This sharing creates strong bonds within the molecule.

* Ionic bonds involve the transfer of electrons from one atom to another, creating ions with opposite charges that attract each other.

Because starch is made up of glucose molecules linked together by covalent bonds, it's considered a covalent compound.