Ayúdenme

Necesitó pasar a octavo ;-;

y nose hacer nada xd

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .

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.