Ahorse would be able to run faster if most of the mass in its legs were concentrated
a. in the upper part, nearer the horse's body.
b. halfway up its legs.
c. toward its feet.
d. uniformly all along its legs. e. none of the above

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.