Affiliate Marketing Secrets

Can someone please explain to me what a niche is? And differentiate it with a habitat (not like a huge paragraph just the main point)
So I’m stuck with this here. The Directions are to label the examples below either habitat or niche. (these are the numbers on the paper, I don’t want to get confused)
12. A chameleon changes its colors to blend in with its surroundings.
13. Ducks and amphibians live in or near a pond.
14. Birds nest in trees.
15. A male lion’s mane attracts a mate.
16. Your cat’s sense of smell helps it find its way home.
17. Monarch butterflies eat milkweed, making them poisonous to other species.
18. Woodpeckers use their beaks to pry insects from trees.
Please, somebody help me here!!