Given a scientific question, generate a correct answer to it.

[EX Q]: In contrast to mammals and birds, freshwater fishes produce large volumes of very dilute what?
[EX A]: urine

[EX Q]: Giardiasis and malaria are diseases caused by what organism?
[EX A]: protozoa

[EX Q]: Alpha, beta and gamma are three types of what?
[EX A]:
radiation