Answer:
A retrieval question is judt where you have to read a given text and write down, literally, what it tells you.
It is called 'retrieval' because you are showing that you have the skill to 'retrieve' information from a text, while also demonstrating that you understand the text itself.
There aren't any hidden loopholes, it isn't like an inference question (where you have to write about what the text is saying 'in between the lines'), it really is as plain as it sounds!