Answer: Monosaccharide
Step-by-step explanation:
Starch is a polymer made up of many monomer molecules. The monosaccharides gets attached together to form polysaccharide. Plants perform photosynthesis and glucose is produced during this process.
This glucose is converted into starch and is stored in the plant body at different places. Like animals plants also require energy to perform various vital functions of the body.
So, at this time polysaccharides will be broken down into monosaccharides to be used by the plant cells.