The answer is construct validity. This is used to associate and interrogation of causal claims. Through determining the variable, interrogation is already being done to see if the variables have an effect on what is being measured. This way construct validity is being done. Also, one variable can be studied in different angles to understand the degree of how it takes effect or how can it be associated.
Source
http://nortonbooks.typepad.com/files/research-methods-in-psychology-sample-chapter-3-1.pdf
Distressful, dysfunctional, atypical, disturbing, maladaptive, and deviant.
Because theres gravity that hold it down?
C is correct. It should be rotation
A. Revolution is not definitly correct
B. Either
Answer:
In 1 hour it will cover a distance of 15°
Explanation:
We know that for each rotation earth takes 24 hour
In 24 hour its travels 360° of rotation
We have to find how much we travel in 1 hour in degree
We know that 1 rotation = 360° which is completed in 24 hours
So distance traveled in 1 hour in degree will be = 
So in 1 hour it will cover a distance of 15°
