It’s saying if you appreciate what you have, you won’t want more. You like what you have. If you concentrate on what you don’t have, “you will never have enough” because you can’t have everything!
Protozoa-
Cholera
Malaria
Amebic Dysentery
Fungi-
Ringworm
Athlete's foot
Histoplasmosis
Rickettsiae-
Typhus Fever
Rocky Mountain Spotted Fever
African Tick Bite Fever
Answer:
adapts to repeated demands
Explanation: