Components are the pieces available in your toolbar used to build items (both general/stimulus and question items) that you can add to a test. One item might include a combination of general, stimulus, and response components.
General and Stimulus components are used to support the questions you create with text, images, video, hyperlinks, and legal notices.
Response components require the user to make a selection such as multiple choice or fill in the blank. All Response components have a built-in text component for the title (which can be shown or hidden).
The primary difference is that points are assigned to response components, but not to stimulus or general components. This determines how many points a test taker earns or loses when they answer a response component on a test.