Read the text below carefully:
'Coastal erosion and industrial activities have severely degraded the mangrove forests along the Niger Delta shoreline over recent decades. To counter this environmental decline, local conservation initiatives began reforesting native mangrove species, which stabilized intertidal soils and mitigated tidal flooding. Subsequently, restored habitats supported the return of indigenous marine life, renewing fishing opportunities for surrounding artisanal communities. Ultimately, this ecological recovery prompted regional authorities to establish legally protected marine sanctuaries, ensuring long-term coastal resilience and sustainable resource management.'
Based on the passage, arrange the following synthesized summary statements in their correct logical sequence from the initial problem to the final policy outcome.
- 1Industrial activities and coastal erosion degraded the native mangrove ecosystem along the Niger Delta coast.
- 2Grassroots reforestation efforts restored mangrove trees, stabilizing shoreline soils against flooding.
- 3Ecological rejuvenation enabled local marine biodiversity to recover and restored community fishing livelihoods.
- 4Regional authorities instituted formal marine sanctuaries to secure sustainable long-term environmental protection.