I believe the answer to your question is D. Full Moon sorry if i am wrong.
Hello. You did not present the experiment to which this question refers, which makes it impossible for me to give you an answer. However, when searching for your question on the internet, I was able to find another question exactly the same as yours, which showed that Rachel was studying the causes and consequences of treating mental illness in patients with generalized anxiety disorder. In this experiment, she gave each participant an untested drug, a placebo and a nocebo and assessed how these substances altered the arousal of the sympathetic nervous system one week before and one week after the study.
If that is the case with her question, the two reactions that Rachel could use to operate the dependent variable would be placebo and nocebo.
We can reach this conclusion because both the nocebo and the placebo do not generate real effects in the participants, but it causes psychological effects, imagined by the patient, against the real medicine. In this case, both the placebo and the nocebo are capable of provoking pisological effects in the excitation of the sympathetic nervous system of the patients. Within an experiment, the variable that has the power to provoke something is the independent variable and it is this variable that allows the researcher to operate the dependent variable. In this case, we can consider that the nocebo and the placebo are the independent variables that can manipulate the dependent variable, which is the sympathetic nervous system excitation.
Carl Linnaeus classified organisms by appearance and physical features. In his time, this was accepted. As time went on, he was deemed incorrect due to new discoveries. However, he did help the scientific community in another way. He classified organisms with their common ancestors.
In my opinion, the fourth answer is correct (D).
The Office of Ecology and Conservation of Natural Resources is an organ that aims to develop policies for the protection and sustainable use of natural resources existing in the American territory. In this way, the body formulates guidelines and policies for access to natural resources that do not jeopardize their existence.
In this context, when the natural resource is in a critical state of convergence, the Office of Ecology and Conservation of Natural Resources adopts measures of monitoring and conservation, preventing the exploitation of that particular resource.
I think it is true because sense central America has been immune to the events they must stay stay pretty much to themselves as a region of nations.
