None of the above - it's an invertebrate ! Which is why I moved the question into the worms category from snakes !
Answer
Indeed, all worms are invertebrates whereas all the groups you mention in your question are classes of vertebrate. Specifically, earthworms are annelids, coming from the phylum of segmented worms, Phylum Annelida.
It isn't either of those.
It's an invertebrate in the annelid phylum.
No, there are also insects, worms, arachnids, fish, amphibians, birds and mammals.
Sharks are neither amphibians, mammals or reptiles. Sharks are fish.
Fish, and then amphibians, and then reptiles, and then mammals
Amphibians , reptiles , mammals along with birds are included in Tetrapod Vertebrates .
No they are not mammals. Amphibians and Reptiles are other classes of animals at the same level as the mammals. Mammals have hair, are warm blooded and give birth to live young. Amphibians and reptiles reproduce using eggs.
Now That Is Just Ridiculous. Everyone Knows That Rhinos Are Mammals. Not Reptiles And Amphibians. So It Is Neither Of Them. They Are Mammals.
reptiles and amphibians have the most in common
They are mammals.
Neither...They were reptiles. dinosaurs were nether amphibians or mammals they were all reptiles, though they are more closely related to birds.
1:fish 2: amphibians 3: reptiles 4: birds 5: mammals
Lambs are mammals.
Other animals include; amphibians, reptiles, birds, fish, insects, worms, molluscs and many more.