The image below shows the development of costume for Superman and Batman across TV and Film. This is the kind of useful information that might be handy in an exam, especially for questions 3 & 4.
Remember: you don't need to be a costume expert to mention this stuff-describe the changes in broad terms first (more colourful, less bright, more realistic, a bit silly looking, more technology etc) and the just describe WHY you think the chances might have happened.
A good revision technique is to try it with this image-describe the changes and why they've happened.
Then, try for other costumes; search google for 'captan america costume development' or 'Spider-Man costume evolution' for example.