Answer:
The correct answer is option C. Unicellular: Chlamydomonas/ Colonial: Volvox/ Multicellular: Ulva
Explanation:
Chlamydomonas is the genus of unicellular algae of about 325 species. All species are unicellular and biflagellate. Volvox is the green algae that form spherical colonies up to 50,000 cells. Ulva is a larger, edible, multicellular green alga.