The correct answer is B. Hexapods
Explanation
Hexapods are insects belonging to a subclassification of arthropods, which have particular physical characteristics such as a body composed of three sections (head, thorax, and abdomen) and six legs, three on each side. Also, they are classified depending on their diet into three groups: chewers, choppers, and suck. finally, they are classified into terrestrial and flying groups. Flies have a body composed of three sections (head, thorax, and abdomen) and six legs, so flies are hexapods. So, the correct answer is B. Hexapods.
