Explanation

Amoebae: 

• Use temporary pseudopodia foot-like extensions of the cell membrane, for movement and capturing food.
• 'Psuedopodia' means 'false feet'.
• Amoeba is an irregularly shaped unicellular organism.
• It is usually present in water bodies

Plasmodium:

• This is a genus of parasitic protozoa known for causing malaria.
• They do not use pseudopodia for movement.
• Instead, they have a complex life cycle involving different forms such as sporozoites and merozoites, which move through gliding motility.

Polytrichum:

• This is a genus of mosses.
• Mosses do not use pseudopodia; they are non-vascular plants
• And use structures like rhizoids for anchorage, and they disperse spores for reproduction.