Final answer:
Websites that use Web 2.0 technologies differ from earlier support websites primarily in the level of user participation and interaction.
Step-by-step explanation:
Websites that use Web 2.0 technologies differ from earlier support websites primarily in the level of user participation and interaction. Web 2.0 websites allow users to actively create and share content, as well as engage in social interactions with others. This is in contrast to earlier support websites where users could only passively view content without the ability to contribute or interact.
For example, earlier support websites may have consisted of static pages with information provided by experts, whereas Web 2.0 support websites often include features such as forums, user-generated content, comments sections, and social media integration.