What type of algae is characterized by the presence of chlorophyll a and b, cellulose cell walls, storage of sugar as starch, and unicellular and multicellular species.

fire algae

red algae

green algae

euglenophytes

It's the red algea I hope that will help

green algae

Explanation:

Green algae are photosynthetic organisms in kingdom Plantae. They have chloroplasts which contain both chlorophyll a and b which gives them green colour , unlike other algae groups which contain only chlorophyll a. They also have other accessory pigments like xanthophylls and beta carotene.

Like plants their cell wall also has cellulose and they also store sugar as starch. They are mostly found in water but sometimes can also be found in moist soil. Often they live symbiotically with other organisms. They can be both unicellular like Chlamydomonas or multicellular like Volvox.