The correct answer is a density-independent factor.
Density-independent factor refers to any factor that restricts the population size, and whose influence is not reliant on the number of people in the population. An example of such a factor is a hurricane that will eradicate or kill all the individuals of the population, which comes under its influence irrespective of whether the size of the population of large or small.
DNA is located in the nucleus of the cell, and makes up the chromosome found there. DNA is often called the building blocks of an organism?????
If DNA is found at a crime scene it can help locate people that were at the crime scene. If the criminal has committed crimes before their DNA will already be in the police system. If not they can take samples from suspects and pinpoint who committed the crime.
The exosphere is the thinnest layer of earths atmosphere. This also the layer of earth's atmosphere that is closest to space.