Bushfire
Bushfire behaviour is driven by the fire triangle (fuel, oxygen, heat) plus weather, topography and fuel load. Candidates must know the Fire Danger Ratings (Moderate, High, Extreme, Catastrophic) and that Catastrophic means the safest option is to leave early - homes are not designed to survive every fire. Understand ember attack: most homes lost in bushfire are ignited by wind-blown embers, not the main flame front, so gutter clearance, screen vents and removing doormats matter. Learn the difference between defendable space (reduced fuel near a home) and fuel reduction burning (broad hazard reduction). Know that bushfires can move faster uphill, spot ahead of the front, and that radiant heat is the main killer of people caught in the open.
Traps: questions often imply you should 'wait and see' - the correct answer is almost always to act early. Another trap confuses Total Fire Ban (no fire in the open, restrictions on machinery) with a Bushfire Advice/Watch and Act/Emergency Warning scale. Do not assume a fire-rated bunker or dam is a safe fallback; official advice treats them as last resorts.
Rule of thumb: Leave early, never late. If your route is blocked or the fire danger is Catastrophic, the answer is to leave the area before the fire arrives, not to defend.
Worked example: A question describes smoke visible on the horizon, wind change forecast, and a Watch and Act message. The best action is to enact your bushfire plan and leave now while roads are open - not to hose the roof first.