In which of the following do the organisms of the Kingdom Animalia show great diversity?

$A$ list of animals is given below. Identify the animals with an open circulatory system and choose the correct answer.
$(A)$ Ascidia $(B)$ Cockroach
$(C)$ Earthworm $(D)$ Prawn
$(E)$ Silverfish $(F)$ Snail
$(G)$ Squid

Which one of the following is $NOT$ an adaptation in endoparasitism?

What is true about $Nereis$,scorpion,cockroach,and silver fish?

Match the animal name in Column-$I$,its characteristic in Column-$II$,and its Phylum/Class in Column-$III$ correctly.
Column-$I$ (Animal) | Column-$II$ (Characteristic) | Column-$III$ (Phylum/Class)
$A$. Adamsia | $i$. Radial symmetry | $x$. Porifera
$B$. Petromyzon | $ii$. Ectoparasite | $y$. Cyclostomata
$C$. Ichthyophis | $iii$. Terrestrial | $z$. Reptilia
$D$. Limulus | $iv$. Body covered by chitinous exoskeleton | $w$. Pisces

Select the correct match for Column $X$ and Column $Y$:

Column $X$	Column $Y$
$(1)$ Aves	$(A)$ Endoskeleton made of cartilage
$(2)$ Amphibia	$(B)$ Left aortic arch
$(3)$ Chondrichthyes	$(C)$ First homeothermic animals
$(4)$ Mammalia	$(D)$ Metamorphosis