Question

during which type of succession does weathering and erosion need to break down the rock into usable soil?

tertiary succession

primary succession

aquatic succession

Explanation:

Primary succession occurs in lifeless areas where there is no soil initially, only bare rock. Weathering and erosion are needed to break down the rock into usable soil to start the ecological succession process. Secondary succession happens in areas where soil already exists (after a disturbance like a fire), and aquatic succession is related to aquatic environments. So the type of succession where weathering and erosion break down rock into soil is primary succession.

Answer:

B. primary succession (assuming the middle option is labeled as B, with the text "primary succession")