To solve the question regarding the type of ecological succession that occurs after a flood, we need to understand the concepts of primary and secondary succession.

Explanation:

• Primary Succession: This occurs in lifeless areas—regions where the soil is incapable of sustaining life because of factors such as lava flows, newly formed sand dunes, or rocks left behind by retreating glaciers. Primary succession involves the gradual establishment of biological communities in nearly lifeless areas where there is no soil in a terrestrial ecosystem, or no sediment in an aquatic ecosystem.
• Secondary Succession: This type of succession happens in areas where a disturbance of some kind has destroyed a biological community but left the soil intact (or sediments, in the case of aquatic ecosystems). It often follows events such as fires, hurricanes, or floods. The soil remains, thus allowing faster recovery since the seed bank and vital nutrients remain.

After a flood, the primary resource, soil, is still present, meaning secondary succession occurs. The biological community can regrow from intact soil and surviving seeds and organisms.

Conclusion: Given that the soil remains after disturbances like a flood, allowing vegetation to quickly regrow due to remaining nutrients and soil structure, this situation is characteristic of secondary succession. Therefore, the correct option is (c) Secondary succession.