Items 15 - 18 are only for "employed" and "unemployed"
Line No. 16.- Branch of activity [Industry]
Ask this question only for the case of "Employed" and "Unemployed".
This question is intimately related to the previous, you should write down the branch of activity that corresponds to the occupation written down in it, that is to say, the type of industry, business, institution, agricultural operation, public dependence, etc., in which the person did their occupation. Write down expressions like: car repairs, shoe factory, Ministry of Government Work, local store, bar, magistrate, hospital, bank, Ministry of Health, shoe store, pharmacy, etc. Here also you should avoid generic terms such as: workshop, factory, government, commercial establishment, etc., which say nothing about what is wanted to be known.
When it concerns a commercial establishment, specify if it is "Wholesale" or "Retail".
If a person works for a company that manages more than one activity, write down the one that you are informed is most important.