The equation that best represents conservation of matter is: **6H2O + 6CO2 → C6H12O6 + 6O2.**
However, it seems that this specific equation is not provided in the options you listed. Among the options, the closest one that reflects the conservation of matter (where the number of atoms for each element on both sides is balanced) is:
**6H2O + 6CO2 → C6H12O6 + 6O2.**
This equation indicates that the number of atoms of each element is the same on both sides, illustrating the principle of conservation of matter. If you're looking for the correct answer from the options you provided, none of them accurately represent conservation of matter, but the correct form is as shown above.