a. Rhodophyceae
b. Chlorophyceae
c. Phaeophyceae
d. All of the above
A)Correct option – C
B) Explanation of correct option –
●Phaeophyceae is a brown algae.
●Phaeophyceae is a large group of multicellular algae, including many seaweeds .
● Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat.