Concept:Breathing roots, or pneumatophores, perform gaseous exchange through small pores called lenticels found on their bark.
Explanation:Breathing roots are specialised aerial roots commonly seen in mangrove plants.
They grow upwards so they can project above waterlogged soil or low-tide levels.
The exposed bark of these roots has small openings called lenticels.
These lenticels allow oxygen from the air to reach the underground root system.
Stomata are found on leaves, the cuticle is a protective layer, and mitochondria are cell organelles, so they are not involved here.
Answer:B. lenticels