Which product of photosynthesis is released from leaves as a gas?

Oxygen, it takes in Carbon Dioxide and releases Oxygen as a waste :)

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

Confused on question what should we be answering