The factor that might increase enough in freshwater wetlands to affect plant and animal life is **B. salinity**.
When sea levels rise, they can cause saltwater to intrude into freshwater wetlands, increasing the salinity levels in the soil and water. This change in salinity can have detrimental effects on the plant and animal life that are adapted to a specific level of salinity. Some species may not be able to survive in higher salinity conditions, leading to disruptions in the ecosystem.
Increased salinity can also affect the availability of nutrients and water uptake by plants, further impacting the overall biodiversity and health of the wetland ecosystem. Therefore, rising sea levels can have far-reaching consequences beyond just coastlines, affecting various aspects of ecosystems such as freshwater wetlands.
