Which of the following is not an example of a protist?
Paramecium
Kelp
Snail
Algae

Correct Answer - Snail.

Why? - Algae, singular alga, members of a group of predominantly aquatic photosynthetic organisms of the kingdom Protista.

Paramecia are single-celled protists that are naturally found in aquatic habitats. They are typically oblong or slipper-shaped and are covered with short hairy structures called cilia. Certain paramecia are also easily cultured in labs and serve as useful model organisms.

Algae resembles a tall grass, giant kelp is not a plant. Instead, it is a brown alga and is part of the large kingdom of life known as the Protista.