What is needed regarding dynamic examples for accessibility?

The correct choice highlights that dynamic examples for accessibility must ensure that they pass contrast requirements before any additional content appears. This is particularly important because ensuring adequate contrast is essential for users with visual impairments. Good contrast allows all users to discern information clearly, making content more legible and accessible.

Dynamic content can often introduce visual complexity or additional layers of information, which may hinder comprehension if the contrast is insufficient. By ensuring that the content meets contrast standards before additional information is presented, it creates a more user-friendly experience, enhancing readability and accessibility for individuals with different types of visual disabilities.

In this context, the other choices do not align with key accessibility principles in the same way. While animations can enhance dynamic examples, they are not a requirement for accessibility. Requiring keyboard-only activation may exclude users who rely on other input methods, such as touch or voice commands. Lastly, while preventing automatic refreshing can help maintain user focus, it doesn’t specifically address the fundamental requirements of contrast and accessibility as directly as the correct answer does.