Algae increase the level of dissolved oxygen in the immediate environment
Algin is obtained from red algae, and carrageenan from brown algae
Agar - agar is obtained from Gelidium and Gracilaria
Laminaria and Sargassum are used as food
Solution
Algin chemical is taken from brown seaweeds. It is used to make medicine and carrageenan from red algae a substance extracted from red and purple seaweeds, consisting of a mixture of polysaccharides. It is used as a thickening or emulsifying agent in food products.