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 areas with no pre - existing soil. Weathering and erosion break down rock to form the initial soil for plant colonization in such areas. Tertiary succession is not a standard ecological term. Aquatic succession involves changes in aquatic ecosystems and does not focus on rock - to - soil conversion through weathering and erosion.

Answer:

primary succession