You are presented with the question "What release oxygen during the day but not at night?" and the following answer choices: 
- sea anenomes
 - Organic compounds
 - orange trees
 - coral
 - power stations
 - humans
 - swamp vegetation
 - important habitats

Now knowing that plants release oxygen during the day but not during the night and all orange trees are plants, choose the best answer.


 

   orange trees      