The correct answer to the question is option 2: "Get oxygen for respiration." Pneumatophores are specialized root structures found in certain plants that grow in waterlogged or swampy environments. These structures help the plant obtain oxygen for respiration when the soil is low in oxygen or completely waterlogged. Pneumatophores act as snorkels, allowing the plant to exchange gases with the atmosphere. They have pores called lenticels, which allow for gas exchange between the atmosphere and the plant`s internal tissues. This enables the root system to obtain vital oxygen, which is necessary for metabolic processes such as respiration. It is important to note that while option 1 (protect plant from animals), option 3 (supports plant in standing upright), and option 4 (helps plant for pollination) may also be important functions in plants, they are not directly associated with pneumatophores.