What happens to the process of succession after a volcanic irruption?

Lava from a volcanic eruption hardens into bare rock. Primary succession begins with soil formation. The first stage of succession involves pioneer species. In primary succession, pioneer plants are those that can grow without soil, such as lichens.

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i think its the first one

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.