Why is it important to know the difference between science and pseudoscience?
to look intelligent
to make informed decisions
to score well on tests
to tell believable stories

To make informed decisions. 

Hello, 

I think the answer to your question is the second option which reads "to make informed decisions". The main concept that differentiates science and pseudoscience is that pseudoscience primarily consists of pieces of evidence provided given that factual information is not provided through data collections, while science is based on concrete evidence and testable claims. The other provided options seem to be minor "perks" of knowledge. You should be able to make these distinctions to make better decisions, not to simply score well on tests or gain respect from others. This is why the second option seems most probable. 

I sure hope this helps.