Final answer:
Public opinion is not subject to rapid and continual change compared to fads, urban legends, and fashions. It evolves over time and can be relatively stable, influenced by deeper societal trends such as shifts in opinion on same-sex marriage and immigration.
Step-by-step explanation:
Among the options provided, the entity which is not subject to rapid and continual change is public opinion. Fads, urban legends, and fashions are all known for their quick shifts and ephemeral nature. However, public opinion, while it can change, does not do so with the same speed; it is often shaped by deeper and more enduring societal trends and can be relatively stable over time. For instance, public opinion on issues like same-sex marriage and immigration has evolved significantly over the last twenty years, but these changes occur in a broader context and over extended periods.
When considering the factors influencing political opinion, it's recognized that race and gender can have an impact. Additionally, it's essential to understand that public opinion polls have varying degrees of influence on different branches of government, with the U.S. Supreme Court being generally the least susceptible to these polls because of the lifelong tenure of its justices and its insulation from direct political pressures.