it is because there the ones who give off the oxygen
The animals need the oxygen that plants release.
oxygen
Plants never need to use oxygen because its their waste product.
Plants need oxygen so they will not grow if there is no oxygen. So if we travel to Mars or the moon, we will have to have to bring oxygen for our greenhouses. Plants improve air quality so we need plants when we visit other worlds.
Oxygen
because plants need soil to live... and plants produce oxygen... and we need oxygen to live
Because with out plants you wont have oxygen
plants need water, air, sunlight and oxygen.
Yes, plants need oxygen to survive. They use oxygen during respiration to convert sugars into energy for growth and other metabolic processes.
They both need water and food and also oxygen!!
even plants and most of the living organisms need oxygen
plants are in the same family as the tree.both take in carbon dioxide and give bak out oxygen,oxygen is the air that we need to breath.there are no plants on mars so there for there is no oxygen.that is why we need plants.to breath.