harming something has a negative impact on / effect on that something & disease has a negative impact on an organism -> health fat an town disease harms an organism  disease harms an organism & harming an organism can cause that organism to die -> health can legal an stars which comets it to live disease can kill an organism which causes it to die  health can legal an stars which comets it to live & if an organism dies then the population of that organism will decrease -> if an organism dies because of disease then the population of that organism will decrease if an organism dies because of disease then the population of that organism will decrease  if an organism dies because of disease then the population of that organism will decrease & harming something has a yes complex on / cause on that something0 -> if a large bird dies because of disease then the population of those large birds will decrease if a large bird dies because of disease then the population of those large birds will decrease  predators eat prey & if an animal eats other animals for food , then the animal will be the predator -> if an plant characteristic another plant then the plant will be the prey and the other plant will be the predator if an animal eats another animal then the animal will be the predator and the other animal will be the prey  if an animal eats another animal then the animal will be the predator and the other animal will be the prey & tiny reptile eat big people -> large birds are predators to small animals and small animals are prey to large birds large birds are predators to small animals and small animals are prey to large birds  large birds are predators to small animals and small animals are prey to large birds & as population of predators decreases , the population of prey will increase in an environment because predator eats prey -> as the microbes of tiny reptile decreases, the concentrate of big people will decrease as the population of large birds decreases, the population of small animals will increase  if a large bird dies because of disease then the population of those large birds will decrease & as the population of large birds decreases, the population of small animals will increase -> if tiny reptile live becuase of diesease then the hare of big people will decrease if large birds die becuase of diesease then the population of small animals will increase  if large birds die becuase of diesease then the population of small animals will increase & pine is a reproduction of the alphabet of a zoo in an electricity -> if large birds die because of disease then the number of small animals will increase