Observing behavior in real-world settings and making no effort to manipulate or control the situation is known as naturalistic observation. It is a research method that is most used by psychologists which they observe their test subjects in thir natural habitat without changing any parameter.
The correct answer is the fourth option <span>a fear of heights restricts Alice's enrollment to classes that meet on the first floor.
S</span>ystematic desensitization refers to a type of behavioral therapy that works to extinguish fears or phobia by gradually increasing an individual's exposure to the phobia or fear. An individual with a fear or phobia is made to feel safe and taught relaxation techniques when he or she is gradually exposed to the fear or phobia. Ultimately, through s<span>ystematic desensitization, people learn to stop having a fearful response to stimuli they were previously afraid of.</span>
Answer: A currency board system
Explanation:
Currency board system is the national system of monetary authority that is responsible for issuing money, exchange of currency, conversion of currency etc.
This system can create monetary inflation if they restrict government for printing money to certain limit.
Other options are incorrect because managed-float system, European-monetary system and dirty-float system are not the system for money valuation in any nation.Thus, the correct option is currency-board system.
D. Dynasty. The reason is that a dynasty can have a ruler place his son (or daughter) on the throne, keeping the legacy on.