How determining possible physical threats may affect the choice of physical security countermeasures

Use the information found at https://nces.ed.gov/pubs98/safetech/chapter5.asp to research how determining possible physical threats may affect the choice of physical security countermeasures while planning new or updated security systems. Summarize your findings.

Fully address the question(s) in this discussion; provide a valid rationale or a citation for your choices.