Protozoan X moves and captures prey using pseudopodia, while protozoan Y possesses an infectious spore-like stage in its
Amoeboid protozoans use pseudopodia for movement and food capture. Sporozoans possess an infectious spore-like stage; Plasmodium is the example given for this group.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Euglenoids Slime Moulds Protozoans