Which would be the responsibility of the department of homeland security following a terrorist attack

Ahistorian studying urban history in chicago in in the early 1900's. she is studying the population changes and the activities that people did in their everyday lives. based on the description which school of thought does the historian likely belong to

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

All of the following cities are located in china except