Answer:
1. A lion is heavier than a cat.
2. The green fish is bigger than the orange fish.
3. My father is taller than my grandfather.
4. A canary is smaller than a puffin.
5. Tess is slower than Dev.
6. A fish is lighter than an orca.
7. I am faster than my friend.
8. A sea otter is darker than a lion.
9. My hair is longer than my teacher's hair.
10. A sunny day is better than a cloudy day
11. My teacher is younger than my mother.
12. My cat is older than my dog.
13. A zebra is shorter than a giraffe.
14. Mathis is worse than English.