Which is a precursor to a geological event? a car driving over a bridge before an earthquake steam rising from a volcano's mouth before an eruption

Steam rising from a volcano's mouth before an eruption is indeed a precursor to a geological event. This steam is often an indicator that magma is approaching the surface, causing the surrounding water to heat and create pressure. If you encounter signs like this, consider staying at a safe distance and keeping up with geological updates—after all, nature can be a whistleblower with a fiery twist! On the flip side, that car driving over a bridge before an earthquake might seem connected but isn’t really a reliable precursor. Earthquakes typically don’t announce themselves! However, scientists employ sensors and monitoring equipment that can pick up on smaller tremors (foreshocks) that could suggest a larger quake is on the way. Staying informed is key to safety in quake-prone areas!