Longitudinal studies allow researchers to follow their subjects in real time. This means you can better establish the real sequence of events, allowing you insight into cause-and-effect relationships. ... Longitudinal studies also allow repeated observations of the same individual over time.
You're answer is going to be <span>C. Problem/solution</span> because in both the first and second events, the student (you) were presented with a problem that was solved with a quick solution. E.x. racial segregation=Executive Order 8802 and WW2=African Americans can join service.
The quote shows that the author believes that the absence of wolves has turned the Elks into an inharmonious and troublesome element in nature.
We can come to this answer because:
- The article aims to show how the absence of predators in an environment can cause a strong environmental imbalance.
- This is because the absence of predators can cause the herbivore population to grow out of control, promoting disharmony in nature.
This disharmony is shown in the sentence presented in the question above, where the author shows that in the absence of wolves, the Elks become a type of pest, causing problems, due to the disorder in the food chain.
You can have more information about the food chain at the link below:
brainly.com/question/16065961?referrer=searchResults