Environment Brain Teaser

I have four legs and a tail. I have no teeth. I can swim and dive underwater. I carry my house around with me.
A turtle
I have flat leaves. I drop acorns. I am very tall.
A tree
I have no hands or feet. I have no wings but I can fly up high.
The smoke
Feed me and I will live, give something to drink and I will die.
End Of Game