Answer:a. They are difficult to measure.
Explanation:Psychographics variable are used in demographics, marketing , social research. Psychographic variables refer to attributes associated with a person's attitude , values , interest and lifestyle. These variables can easily change anytime , one's interest varies everyday and can even vary during the day , which makes these variables highly unstable and difficult to measure.
Answer:
Cognitive behavioral therapy
Explanation:
The answer is B. Selection for two extreme variations of a trait
Disruptive selection : changes in population genetics in which extremes value of a trait over intermediate Value
By selecting two extreme variations of the trait, in will be categorized as Directional Selection, nor disruptive selection
The reason why Canada is in a strong position to trade with nations around the world is because it has ports on the Atlantic and Pacific coast - d.
This means they are able to effectively utilize this condition (where they are located) and gain a lot of benefit from it, compared to other nations around the world at least.
An angel to Joseph when to leave Egypt
