explain why fads and Fashions are considered a form of collective behavior then apply a symbolic interaction perspective to explain why people follow fads and fashions.

Idon’t have a clue on how i should understand this i’m in need of assistance.

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.

What is the term eccentricity a measure of?