Components are the pieces available in your toolbar used to build items (both stimulus and question items) that you can add to a test. One item might include a combination of stimulus and response components.
Stimulus components are used to support the questions you create with text, images, and video.
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 between the two is that points are assigned to response components, but not to stimulus components. This determines how many points a test taker earns or loses when they answer a response component on a test.