Answer: Observational
Explanation: Observational study involves careful and physical observation of events. In this kind of study, the independent variable is not under the control of the experimenter as opposed to experimental study.
In the scenario above, Observational study is used to draw inference from a sample to a population, by recording the number of physical or verbal attacks while the researcher observes. The researcher has no control over the independent variable as he only records what he observes.
Answer:
Density independent factors refer to any influences on a population's birth or death rates, regardless of the population density.
Explanation:
Density- independent factor any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population. An example of such factor is an earthquake, which will kill all members of the population regardless of whether the population is small or large.
I believe the answer is a. disapproval
