The correct response is:
This is not true because plants need to sequester nitrogen from the soil to build amino acids.
While photosynthesis does produce glucose, which provides carbon, hydrogen, and oxygen, plants also require nitrogen to synthesize amino acids, which are the building blocks of proteins. Additionally, plants need other nutrients and minerals to build various biomolecules. Therefore, photosynthesis alone is not sufficient for plants to create everything they need to build all biomolecules.