Answer:
The answer is c substitution
1 .insecta
2.arachnida
3. bryophyta
4. mollusca
5. mammalia
6. aves
<u>Explanation:</u>
six legs and three body parts- insecta
2.eight legs and two body parts- arachnida
3. non-vascular and reproduces by spores- bryophyta
4. soft bodies with hard shells- mollusca
5. give birth to live young ones- mammalia
6. lays eggs on land and flies- aves