What do plants do in the dark?

Um well i supposed they just sit there and store food since they can only make food during the day.  but as for trees they absorb carbonation during the night. 

Need the answers if its a multiple choice question

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.