The correct option is C Emergent hydrophytes
A continuous system of air passages from leaves to roots is found in emergent hydrophytes because these are the type of plants that keep themselves up from the top of water and these air passages provide buoyancy to it. submerged plants are sinked in water, floating plants are there on the surface of water. suspended hydrophyte are the plants that are just below the surface of water. So the correct answer is ' Emergent hydrophytes '.