I think that a territory could become a state when it reaches a population of 150,000.
The main reason would be the environment because of the fact their population is so big, they need enough room for everyone. There's also the connection with having available food source within the environment when the people plan to settle in. There's also the idea of desirable climate which helps them with food sources and allows them to flourish instead of dying off.
The correct answer is C. All of the above.
Explanation
Naturalistic observation is a research method by observing a subject or group of individuals or animals directly in their place of residence. Another of its main characteristics is that the researcher must refrain from disturbing or intervening in the lives of those observed to avoid any interference that implies a different behavior than they would have if the observer were not there.
Therefore, it can be concluded that during a naturalistic observation the researcher should be prevented from having behavior that modifies the behavior of the observed group or individual; The observer must be prevented from making value judgments about the results obtained and from subjective or biased views, and the observer must avoid transmitting a message to the observed of how they should behave while they are observed because this can alter their actions. Therefore, the correct answer is C. All of the above.