Answer
b. chromalveolata
Work Step by Step
Kelp represents the protist chromalveolata. Chromalveolata include two subgroups that are stramenopiles and alveolates. Inside the subgroup stramenopiles you can find brown algae. Laminaria, which is commonly called kelp, is a type of brown algae. Therefore, kelp represents the protist chromalveolate. The answer is b.