Final answer:
Movements in public opinion are often explained by external influences, which include demographic characteristics and economic conditions that shape collective attitudes, ultimately affecting politicians' approaches to policy and elections.
Step-by-step explanation:
When public opinion is not stable, its movements can usually be explained by external influences. This can include demographic groups and other sources that indirectly inform an individual's or a population's views on various topics. Public opinion is significant, as it provides insight into how people feel and allows elected officials and the public to interact on critical issues. Collective public attitudes can shift due to economic conditions, and this in turn can affect politicians' behavior and policy decisions. Despite individuals not being fully informed about all aspects of politics, their collective behavior often aligns with rational decision-making, influenced by their political ideology and party membership. Additionally, shifts in public opinion indicate where the electorate stands on certain issues, leading politicians to adjust their stance accordingly.
Savvy politicians will monitor the public mood, and if they notice that the public is leaning more liberal or conservative, they might make minor adjustments to their policies. This behavior is especially true for politicians who frequently seek office and wish to remain aligned with their constituents' preferences.