Solution :(c) Fucus belongs to class-Phaeophyceae, in which RESERVEFOOD is found in form of laminarin, mannitol and oil.Chara belongs to class-Chlorophyceae,inwhich reserve food is found in form of starch and oil.PorphyraandGracillariabelongsto class-Thodophyceae,in which reserve food is found in form of floridean starch andGalactan`S_O_(2)` polymers.