On Thursday Simone used a rain gauge to collect rainwater. On Friday and Saturday, it was very sunny and did not rain. Simone recorded the water level each day in the rain gauge and recorded the measures in the table

These are the amount rainwater collected in rain gauge (in mm) Thursday was 10 Friday was 7 and Saturday was 3
which process explains why the water levels in the rain gauge decreased from Thursday to Saturday?
A: Precipitation
B: Evaporation
C: Condensation
D: Runoff