Answer:
b. Caecilians
Step-by-step explanation:
Caecilians are amphibians that have no legs nor arms and actually look like worms. They have a slimy shiny skin that is pinkish gray colored. Their annuli or skin folds make them resemble earth worms all the more, only larger. Caecilians are also normally buried in the soil, that´s why they are not normally seen.