Answer:
B
Explanation:
All living things need to breathe, even the microorganism which breathe by a process called diffusion. They might breathe using different of mechanisms or organs but THE POINT IS THEY NEED TO BREATHE.
Scale insects mature as sessile.
Is a disadvantage because sessile means nonmotile, which means food has to be readily there for them which it's just not bc land animals typically have to keep moving to survive