Your answer would be D. A building
Answer:
Erik Erikson
Explanation:
Erik Erikson is psychologist who is famous for his theories regarding human development. He explained in his theory that ego play a key and positive role in development of ideas and skills. Ego play chief role to guide human and make them feel guilt on wrong doings. So ego is conscious which make aware about wrong and right differences.
Answer:
A. there are at least two groups, one of which does not receive the experimental treatment.
Explanation:
A controlled experiment is used by researchers to test a single variable at a time. The controlled experiment usually comprise of two groups: one group is the experimental group which receives experimental treatment, while the second is the control group which does not receive experimental treatment and is used to compare the experimental group.
In other words, during investigation, the control group is not exposed to an independent variable unlike the experimental group, hence, the control group serves as the baseline to measure changes in the experimental group.
It is for an online article. Maybe from a popular magazine's website.
Figure 20.1. The Alberta tar sands has become increasingly controversial since Suncor’s first extraction plant opened in 1967. Development of the tar sands is a classic issue that pits corporate interests against environmental sustainability. (Photo courtesy of Dru Oja Jay, Dominion/flickr)