Which animal is the odd one out? - cow - shark - killer whale - rat

Sharks are fish, the other three are mammals.

I'm not entirely sure(I used to have a heifer who liked to eat everything she wasn't supposed to) but I think cows are herbivores while the others are not.

The "killer whale"(which is an Orca, and closer to a large Dolphin than a whale) is the only one that has echolocation.

The rat is the only scavenger on the list.

Probably not helpful, but it's all true.

hello!

your answer will be

abstemious.

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