Eventually the host tree dies and rots and then all that 's left is the vine that 's now strong enough to be by itself as a strange hollow tree - thing . There was one we saw that was completely hollow and we could climb inside . When you look up you can see an opening at the top , so the whole plant is like a big straw or pipe Emma on the Bridge That walk was called the Tree Top Walk because it went to a big bridge going through the canopy .

Question: Why does only the vine get left behind after the host tree dies ?
Answer: Only the vine gets left behind after the host tree dies because people carved out the remains of the tree as it rots .Only the vine gets left behind after the host tree dies because the vine parasitically fed on tree unti it was hollow .Only the vine gets left behind after the host tree dies because the tree had rotted away wile the vine still lives .None of the above choices .