Which statement is an example of situational irony on the piece of string

You are reading an informational text for english class, and you find a lot of words you don't know. your teacher says you don't need to look up all of them in the dictionary, only the ones you need to get the main point of the text. how could text features you figure out which words to look up?

Solve this analogy problem: thick : thin : : heavy : question 1 options: gray round rosy light

Need some on this. which answer is it?