We saw AN otter.
You use ‘an’ when the next word starts with a vowel.
For example:
With vowel - There was AN eagle.
Not a vowel - There was A bird.
Answer:
"Some use it to stay safe from other animals that could eat them"
Explanation:
Jargon is defined as random talk. This sentence has no context and we have no idea what main point they are trying to convey.