Multiple choice Regarding the processes of the water cycle... Aquifers are very permeable and in them the groundwater circulates Surface runoff is produced by the effect of gravity Condensation occurs due to increased temperature The drops of the clouds grow as they heat up until they precipitate Reveal answer Fill a bubble to check yourself B Correct answer Explanation Surface runoff occurs when excess water flows over the land surface, driven by gravity toward lower elevations. Condensation is caused by cooling, not heating.