Data and process modelling involves three main tools: data flow diagrams, a data dictionary, and process descriptions. Describe data and process tools. Diagrams showing how data is processed, transformed, and stored in an information system. It does not show program logic or processing steps.
I would say the correct answer is "octane". It is important that you use the fuel with the correct octane rating recommended by the manufacturer. Among the choices it is only octane that is used as a rating for fuels. Hope this helps.