Explanation:

Let’s break it down:

- Option 1, a flood: Fault lines themselves don’t cause floods. Floods are usually from heavy rain, dam breaks, or high tides.

- Option 2, sudden rain: Fault lines have nothing to do with weather. Sudden rain is just a weather event, totally unconnected to underground rock movement.

- Option 3, an earthquake : Now, here’s the thing—a sudden movement along a fault line does release energy, shaking the ground. That’s literally what an earthquake is.

- Option 4, a storm: Again, storms are a weather thing. Wind, pressure, moisture—none of which involves fault lines.