Researchers believe that massive basal overflow basalts erupted to the surface, and the sharp rise in greenhouse gas concentrations caused by volcanic eruptions provided the necessary conditions for the enhancement of global terrestrial weathering. Continental weathering has huge amounts of ions and nutrients on the surface Salt transported to the ocean, causing eutrophication and ocean acidification of the seawater, which in turn led to the lack of oxygen in the seawater and the reduction of the light transmission zone, which threatened the environmental systems of life in the ocean at the time. This effect accumulated to the threshold and eventually triggered the marine ecosystem Collapse and mass extinction at the end of the Permian. According to this text, which of the following statement is correct. ['The volcanic eruption was an important cause of life extinction at the end of the Permian.', 'The direct cause of ocean acidification is a sharp rise in greenhouse gas concentrations.', 'Enhanced terrestrial weathering has led to massive volcanic eruptions at the end of the Permian.', 'Ocean hypoxia caused by eutrophication of seawater directly leads to the extinction of marine life.']