To which class of Animalia does the housefly belong? Mention any three characteristic features of this class of animals. Give two other examples of this class of animals.

(N/A) The housefly belongs to the phylum $Arthropoda$ and the class $Insecta$.
Characteristic features of $Arthropoda$:
$1$. They are bilaterally symmetrical and their bodies are segmented.
$2$. They possess an open circulatory system.
$3$. They have a blood-filled coelomic cavity known as the $haemocoel$.
$4$. They possess jointed appendages (legs).
Examples of $Arthropoda$:
$Butterfly$,$scorpion$,$cockroach$,$centipede$,$spider$,and $prawn$.