Fruit
Apples are the most delicious. / Watermelons are the biggest fruit.
Planets of the solar system
Mercury is the smallest planet. / Mercury is the closest to the Sun. / Neptune is the farthest from the Sun. / Earth is the best planet for human life.
Common pets
Rabbits are the cutest. / Dogs are the smartest. / Cats are the laziest. / Hamsters are the smallest.
The students in your class at school
Tom is the funniest. / Lara is the smartest. / Felix is the nicest.