Algae Use A. Porphyra 1. Used as a food supplement by space travelers B. Gelidium 2. Used in the preparation of ice creams and jellies C. Laminaria 3. Used as food (edible algae) D. Chlorella 4. Source of hydrocolloids

Step-by-step solution

Porphyra is among the marine algae used as food Gelidium is used to produce agar, which is used in ice creams and jellies Laminaria is a source of hydrocolloids like algin Chlorella is a unicellular alga rich in proteins, used as a food supplement by space travelers