In this question type

You will be given a diagram or a plan and  required to label specific parts with words from the given text or a word list.

Note:You need no prior knowledge of the subject in order to complete it. Remember, this is a test of your reading skills, nothing else. Again, just follow the strategy.

Examples from a real test paper

https://www.ieltsjacky.com/ielts-reading-diagram-labelling.html