Answer:
Photosynthesis requires light energy, respiration does not.
Respiration occurs in all organisms, photosynthesis only occurs in plants, green algae,
and some bacteria.
Respiration occurs in mitochondria, photosynthesis occurs in chloroplasts,
Respiration consumes glucose and oxygen, whereas photosynthesis produces them.
There are more than simply 4 biological compounds in the human body. I suppose to categorise, the question is hinting towards the molecules like Carbohydrates ( Poly and mono saccharides ) Proteins ( Polypeptides Made of amino acids) and Fats. There is also water, but I'm hesitant to class that as a biological compound, as it's not organic.
The moment it is exposed into the environment
