They breath out arbon dioxide
methane
Oxygen is the gas humans and animals need to breathe in.
oxygen
Methane is given off by animals as a waste gas.
oxygen
oxygen
Animals need oxygen to carry out life processes. Plants need carbon dioxide. Some animals and plants can use either if they need to.
Oxygen.
Oxygen
Oxygen
I don't think it is a gas when inside the plant, but most animals/plants need it.
Plants let out gases. This gas is called oxgen which animals and humans need to breathe so we can live. Animals let out a gas called carbon dioxide and the plants need to take in the carbon dioxide to live.
Yes I do like marriage