Concept:
To find the odd one out, we identify the common characteristic among the given animals.
Step 1: Observe the animal category.
Lion, Tiger, Fox, Cheetah, Bear, and Hyena are all carnivorous or mainly flesh-eating animals.
They hunt or feed on meat.
Step 2: Check Elephant.
Elephant is a herbivorous animal.
It feeds on plants and does not belong to the carnivorous group.
Thus, Elephant is different from the others.
Hence, the odd one out is:
\[
\boxed{\text{Elephant}}
\]