The water in the bottom of this bottle best represents -
rainfall

condensation

rivers

accumulation

Option A, accumulation

Explanation:

As we can see in the image,  the water gets heated and convert its pahse from liquid to gas i.e from liquid water to water vapor.  As it rises above, it condenses and converts from water vapor into liquid water. The liquid water then moves in the downward direction and collects at the base. This process of collection at base can be related to accumulation of running water.

Option A is correct

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs