The<em> mere exposure effect</em> is a social psychological phenomenon in which people develop a preference for things because of repeated exposure.
Answer: This was curious, because during so-called REM sleep (rapid eye movement), our muscles are usually paralysed. Researchers realised that inducing a similar state in animals could allow them to probe how they dream.
Explanation:
The answer should be pumice
I believe the answer is D. When the economic diversification increases the standard of living
