Question

the first insects to be attracted to a corpse are the
blowfly pupae
blowfly larvae
blowfly maggots
blowfly adults looking for a place to lay their eggs

Explanation:

Blowfly adults are the first to arrive at a corpse as they are looking for a suitable place to lay their eggs. After laying eggs, the eggs hatch into larvae (maggots) and then develop into pupae.

Answer:

blowfly adults looking for a place to lay their eggs