Answer:
Dr. Ingram conducted an C. experimental study.
Explanation:
An experimental study is that in which the variables are in direct control of the researcher. He/she is in control of <em>changing or adjusting</em> them in order to reach an outcome.
Dr. Ingram <em>varied the imageability of items </em>on a list to measure the participants' recalling abilities. He is conducting an experimental study.
Let's see why the other options are not valid in this case:
- A correlational study tries to find correlations between 2 or more variables.
- In a naturalistic study the researcher observes a certain phenomenon.
- An observational study just centers on observing, there is no manipulation of variables.
A, because that is the basis for the concept of risk pooling.
Answer:
the Battle of Bunker Hill
Explanation:
I believe the answer is: Heroin
Heroin is known for its euphoric effect, which make it a really popular recreational drugs even though its usage is heavily regulated. The increase in heart rate happen because heroin stimulate the user's central nervous system to mimic its function during high-adrenaline/exciting situations.
