Halp i have too more questions but it's in another pls halp

How does photosynthesis show the conservation of mass and energy?

50 points! which of the following is an inference? a burning candle is extinguished when it is covered with a jar. the candle burns longer than expected in a jar that has a plant in it. a plant lives longer than expected in a jar that has a burning candle. there is more oxygen in the jar because there is a plant in it.

Can yall plz me on this question im having a hard time think about it