Answer: Excavata
Step-by-step explanation:
Excavata is a major super group of the unicellular organism which belongs to domain eukaryota.
Most of the organism in this group are non-photosynthetic. They have flagellar structure.
They also includes some parasite that live in the body of human beings including Trichomonas and Giardia.
The leishmania is a disease which is caused by protists called Lesishmania which belongs to the same group Excavata.