1)give me an animal that lives in arctic.
2)give 3 adaptations of this animal

1) Polar Bear

2) - white appearance which helps them camouflage from prey

   - thick layer of fat which keeps them insulated from the cold

   - small round ears which prevent heat loss

Explanation:

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.