Is a negative correlation. It goes down the graph.
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 number of protons in an atomic nucleus; it indicates the position of an element in the periodic table. The number of protons in the nucleus of an atom. Inelectrically neutral<span> atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus.
hoped it helped!!</span>
