the role of is to provide the matter for , which is the main output of photosynthesis. Sugars and carbon dioxide is the option

The role of carbon dioxide is to provide the matter for sugar which is the main output of photosynthesis.

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

The answer is a i believe