The correct answer would be D. Mollusca.
The question is basically describing a snail.
Arthropoda have segmented bodies.
Echinodermata(starfishes, sand dollars etc.) are radially symmetrical.
Also none of them have shells except phylum Mollusca :)
The answer is: <span>Ecological Succession
</span><span>If I managed to help you, please make sure to mark my answer as the "Brainliest" answer. Thanks! :)</span>
True, because the fossils of animals that ,for example, are similar to humans show us the different stages that the species went through, what it looked like, and gives us a good idea of how similar it was becoming to us.
I'm sorry, I tried to do this but my junky computer wouldn't let me.... good luck :)
