Read this passage from When Birds Get Flu and Cows Go Mad! by John DiConsiglio.

For 32 days, they drove along icy roads in the middle of the night. They logged thousands of miles and battled fierce snowstorms. They slept in little motels and ate at truck stops.

Some trudged through muddy farms and feed mills. Others picked through carcasses in slaughterhouses. Some pulled bad burgers from grocery store shelves. At night, they talked on the phone and compared the day’s results.

The author uses the order of events in the passage to

discuss a cause.
explain a solution.
introduce a problem.
reinforce the urgent tone.