How do I know?

I am interested in buying a theme that has a “fully widgetized homepage”

I want my homepage’s “main content” to consist of these three plugins:
http://ww.wp.xz.cn/extend/plugins/twitter-feed/
http://ww.wp.xz.cn/extend/plugins/google-news/
http://ww.wp.xz.cn/extend/plugins/feed-reading-blogroll/screenshots/

The theme owner told me:
“my theme can help you accomplish what you describe above assuming those plugins offer widgets that you can drag and drop into the theme’s widget areas of your choice”

How do I know if the above plugins offer widgets? (sorry if this is obvious, I’m a newbie)

[duplicate of http://ww.wp.xz.cn/support/topic/how-to-tell-if-these-plugins-offer-widgets?replies=2 – please continue with your original topic]