- A rabbit is a kind of animal
- An animal is a kind of living thing
- A bird is a kind of animal
- So, a bird and a rabbit are living things

- A seed is a kind of young plant
- A plant is a kind of living thing
- Hence, a seed is a kind of living thing

- A bird and a rabbit are living things
- A seed is a kind of living thing
- Hence, a bird, a rabbit, and a seed are living things

Hence, a bird, a rabbit, and a seed are living things
Which group consists only of living things?
- A seed is a kind of young plant 
- A rabbit is a kind of animal 
- An animal is a kind of living thing 
- A bird is a kind of animal 
- A plant is a kind of living thing