Probably the biggest issue would be lack of food but that isn't even a problem.
yes they could
yes
an elephant could crush an anaconda to death, so yes.
No. The elephant would crush the walrus to death before the walrus stabbed its tusks in the elephant.
No. An elephant would trample a bison to death. A bison could not gore its horns into the elephant because the elephant has thick skin to protect itself from injuries.
No. Even a huge pack of lions experience so much difficulties in taking on an elephant.
No. These two animals live in two entirely different continents and thus will never meet.
A rhinoceros is much shorter than an elephant. They can't rear up on their hind legs, so the would not be able to reach an elephant's throat. Even if it could, an elephant could easily use its trunk to deflect the attack, and could then use its tusks to kill the rhinoceros.
it's pretty toxic. i'm sure enough of it could kill an elephant.
Yes. A cobra would spray poison at the rhino, and a cobra could also kill an elephant with its poison.
a chicken can have a chickenpox but an elephant cant have a elephantpox
With a pink elephant gun.