hi there! this seems like a personal question that i can't really help u with, however i'll help u to figure it out:
so first, what civilzation do you live in? is it an apartment complex, a neighborhood, downtown, the suburbs, the countryside, and then say something that you and your family would need to trade in order to survive (answers could be food, or things you can't live without).
now choose if you would trade with only your neighbors, or would you expand to trade with other neighborhoods, your friends families, etc.
then explain why you chose that. i don't really think this part of the question needs to be too in-depth.
then just do your best to answer the rest of the questions, hopefully this helped and gave u a good outline on what to write!!