Paragraph 1: introduction. What is your animal called, what does it look like? What does it eat?
Paragraph 2: How does this animal catch its prey? (This is the bit which explains the 'how' and 'why')
For example:
How Does a Tigon catches Its Prey?
Tigons are a cross between a female lion and a male tiger. Unlike ligers,
which are also a cross breed, tigons are much smaller than a lion or tiger.
Tigons have four legs, a long tail and powerful claws. Interestingly, they also
have a spotted and striped coat and a small mane similar to a lions.
Tigons, like lions and tigers, eat meat. First they
hide in order to sneak up on their prey. Then they slowly approach the prey
until they are within striking distance. When ready the tigon will leap at the
prey, usually from behind, and sink its teeth into the animals flesh. The tigon
will then drag its prey away to a safe place to feed on it. As always, you need to think about sentences (think, say, write), spellings and making your writing interesting!
I look forward to reading your explanations!