Literal question
56. Material used for cooking. For wood or charcoal, write 1; petroleum, paraffin, etc. write 2; for [propane] gas, electricity write 3.
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Column 47-57. These columns are for the dwelling or house that the family occupies. Therefore, the answers will only be written in the row for the head of household.
Column 47: If the family that lives in the dwelling is the homeowner, make an X. If not, leave the column blank.
Interviewer instructions
Column 56. The enumerator should ask what type of fuel is habitually used in the kitchen to prepare the food. If firewood or carbon is used, write the number (1) in this column; if they use refined petroleum, diesel, gasoline, etc., write the number (2); if they use electricity (stoves), gas, or any other type of modern combustible, write the number (3).