a motorcycle accident the rider broke three ribs and one of them punctured his chest wall. The rider will find it very difficult to inhale because

thinking it would be d not too sure but i think it's right

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.