Population density can be define as the number of individuals of the population of a species living in a particular area over a concerned time. It is affected by the death, birth, immigration and migration of the members of the concerned population.
On the basis of the above description, this can be concluded that the ecologist is looking for the population density.
If CPR is not performed, C. 4 minutes will elapse before the brain becomes damaged from lack of oxygen. One minute isn't enough time - you can even hold your breath for one minute without fainting. Some people can even do it for 2 minutes. Ten minutes is too long - you would be long dead.
