Answer:
Probably because they just need air to being able to live and have air going in and out like carbon dioxide and getting rid of used air.
sand dunes form from wind
I THINK it's Carbohydrates and cholesterol. I couldn't find a very clear answer.
Human stem cells haven’t specialized in to create an organ. This means that they can be manipulated to create a variety of organs for organ transplant and therefore lowers the risk of rejection
The law of Conservation says that atoms cannot be created or destroyed.
So your answer would be neither.
I hope this helps! :)
