The correct answer is - <em>the phenomenon of self-fulfilling prophecy</em>.
Explanation:
<u>Self-fulfilling prophecy</u> <u>is socio-psychological phenomenon during which an individual or a group of individuals shares a belief that a certain outcome is going to take place and this outcome takes place because their behavior and decisions align for this believe to come true.
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Here, religious groups in America are aware of the idea that there is a high competition among them. Worrying that they are going to lose followers, they start to compete for new followers (<em>behavior alignment</em>) in order to keep the overall number of their followers.
The other good <u>example </u>of a self-fulfilling prophecy is bitcoin bull runs. During the latest bull run of 2019, bitcoin price went up because certain amount of people shared rumors and expectation that it will.
The answer is a relapse. A relapse occurs when a person who has gone into recovery or has been sober for a long time goes back into abusing drugs and any addictive substances. This can also be seen in patients who had shown a period of health improvement goes back to deteriorating state.
