Answer: If a cluster of people stand gazing upward, passersby will often pause to do likewise. This best illustrates D. the chameleon effect.
Explanation: The chameleon effect is defined as someones non-conscious ability to mimic poster, mannerisms, expressions and other interactions without doing it on purpose. Chameleons are able to adapt to their surroundings by changing their colors/appearance, so this term is used to describe the ability for humans to change according to their social environment.
