Answer: Matter is not destroyed, only changes forms.
Explanation: Take my answer with a grain of salt, I'm not a genius in this type of stuff but, the law of matter states that matter is not destroyed, only changes forms. This can be applied to photosynthesis because the plants take water and use it to make glucose to eat.
Again, I'm not genius so take my answer with a grain of salt but, hope it at least helps a little.
grass
B.
bacterium
C.
spider
D.
grasshopper