Answer:
It is important to have more than one piece of evidence to make sure that the evidence is actually evidence. Or in other words, that the evidence is proven true. With only one piece of evidence, you can't be fully sure if calculations were correct, if the source was trustworthy, etc.
Multiple evidence is kinda like double checking math problems. If you don't do it, you can't be 100% certain the answer is correct.
You should have typed the question on Google instead of here
The answer is D)carbone dioxide,water and energy
The more intense the light is, the faster the rate of photosynthesis will occur
