Algae in which body is differentiated into blades, stipes and holdfast belong to

Explanation

The correct answer is Kelps. Kelps are a type of large brown algae that exhibit complex structural differentiation into blades, stipes, and holdfast, allowing them to anchor to substrates and reach sunlight in aquatic environments. Golden algae, Euglenoids, and Diatoms, on the other hand, do not have these differentiated structures. Golden algae are mostly unicellular or colonial, Euglenoids are flagellated protists, and Diatoms are unicellular with silica-based cell walls.