Answer:
7, 2, 5 are the best answers.
The correct answer is functional fixedness.
Functional fixation is a type of cognitive bias that gives us the tendency, as human beings, to only use products and services as they are conventionally used.
It explains why we do not use the items more efficiently and / or cheaply, having been initially studied (and received this name) because of the research carried out by the psychological Karl Duncker.
