Answer:
3 FACTS ABOUT PHOTOSYNTHESIS:
- The chemical equation for photosynthesis is:     carbon dioxide + water --> glucose + oxygen
- Photosynthesis the process by which green plants and some other organisms use sunlight to synthesize (get or create) nutrients from carbon dioxide and water. 
- Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
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The Answer is A but im only about 5% sure about my answer
        
             
        
        
        
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Answer:
A 6H2O + 6CO2 → C6H12O6 + 6O2
Explanation:
The law of conservation of matter states that matter can neither be created nor destroyed in a system. In other words, when elemental matter undergoes a reaction, the amount of elements used must be equal the amount produced. 
The equations in this question depicts the overall photosynthetic process where CO2 combines with H2O to produce C6H12O6 and O2. In order for this equation to obey the "conservation of matter", each individual element must be equal on both the reactant and the product side i.e. the equation must be balanced. 
The equation that fulfills this is:
6H2O + 6CO2 → C6H12O6 + 6O2
Hence, it correctly describes the conservation of matter.