Earth so I can travel underground to escape and make instant shelters.
Shikotsumyaku so I can reinforce under my skin with steel hard bones so the zombies can eat me and I would be super durable. In a Zombie Apocalypse, I would t really go for pure power since your main focus is too survive, not wipe out zombies. Those are what I thought to be the most practical out of the list.
If given free reign I would've chosen Byakugan so I can't get sneaked up on and Gaara's sand for ultimate Defense.