Correct Answer: Get oxygen from respiration

Solution : The correct option is to Get oxygen from respiration .

Pneumatophores are specialised aerial roots that sprout in certain plants, especially those that grow in marshy or wet conditions. Because oxygen availability is limited in wet soils, pneumatophores facilitate gas exchange between the roots and the atmosphere. These roots sprout from the plant's submerged portions and extend above the water's surface. As an adaptation to their coastal, and wetland habitats, mangrove trees have pneumatophores.