Answer:
is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. ... Some examples of protozoa are Amoeba, Paramecium, Euglena and Trypanosoma.
Answer:
A. Positive reinforcement
Explanation:
Because since the teacher will give credit for the homework the students started to turn in work.
