What is an example of discrimination?

Discrimination involves treating someone unfairly or unjustly based on characteristics such as race, gender, age, or ethnicity. The correct answer exemplifies this concept clearly: refusing service based on ethnicity demonstrates a clear bias against individuals based on their background. This action not only marginalizes the affected individuals but also reinforces negative stereotypes and divisions within society.

In contrast, the other options focus on promoting equality and inclusivity. Supporting diversity in hiring practices, for instance, actively seeks to embrace individuals from different backgrounds, ensuring that opportunities are available to all, regardless of their ethnic or demographic status. Providing equal access to public services is about ensuring that everyone can utilize facilities and services without bias or barriers. Encouraging participation from all community members fosters inclusiveness and collaboration, promoting a sense of belonging.

Thus, the essence of the correct answer lies in its demonstration of unfair treatment based on ethnicity, which is the hallmark of discrimination.