Which of the following describes the nature of political support during a 'party era'?

The description of a 'party era' in this context refers to a period when one political party consistently dominates the political landscape, winning the majority of elections and thus shaping policies and governance according to its platform and objectives. This dominance can result from various factors such as public sentiment, effective leadership, or a lack of cohesion within the opposing party.

During a party era, the prevailing party is able to establish strong party loyalty among voters, contributing to its sustained electoral success. This consistent support often influences political discourse and can lead to significant legislative achievements. The relevance of this answer lies in understanding how the dynamics of political power can shape government action and policy direction during such a time.

The other options do not accurately represent the phenomenon of a party era. For example, an evenly split support between parties indicates a competitive environment rather than a dominance by one party. Constantly changing support reflects instability, which contradicts the essence of a party era where one party holds a significant advantage. Lastly, claiming that political parties are irrelevant in elections directly opposes the concept of party eras, which fundamentally relies on the impact of political parties on electoral outcomes.