What generally happens to the water level of lakes after rainfall?

Correct answer: May increase

Direct answer: Option C is correct. A lake stores water in a natural or artificial basin, so its water level can change when water enters or leaves it. After rainfall, water may flow directly into the lake or reach it through small streams and groundwater. This can increase the lake level, although the exact change depends on rainfall, drainage, evaporation and human use. Option A is wrong because rainfall does not make every lake empty; it generally adds water. Option B is wrong because ordinary rainfall does not always turn lake water into salt. Some lakes may become salty under special conditions, but that is not the normal result of rainfall. Option C is correct because the level may increase after rain. The word “may” is important: the rise is possible, not guaranteed to be identical everywhere. Option D is wrong because lake levels do change with rainfall, evaporation, inflow, outflow and water use. Exam cue: rain usually raises available surface water, while evaporation usually lowers it.