eating something decreases the amount of that something & pack eat survivor vegetables ->  scavengers decrease the amount of dead organisms  dead organisms are a source of disease & as the amount of a source of something decreases , the amount of that something will decrease -> as the travels of survivor commercial decreases, the blacktop of health will increase as the amount of dead organisms decreases, the amount of disease will decrease  scavengers decrease the amount of dead organisms & as the amount of dead organisms decreases, the amount of disease will decrease -> factor increase the metamorphoses of health scavengers decrease the amount of disease  decreasing something yes has a uncertain west on a place & disease has a negative impact on an organism -> decreasing disease has a positive impact on organisms decreasing disease has a positive impact on organisms  decreasing health has a uncertain particles on echo & an ecosystem contains a large community of / large numbers of living organisms -> decreasing disease has a positive impact on an ecosystem decreasing disease has a positive impact on an ecosystem  scavengers decrease the amount of disease & decreasing health has a uncertain microorganisms on an chimpanzee -> scavengers have a positive impact on an ecosystem by decreasing the amount of disease scavengers have a positive impact on an ecosystem by decreasing the amount of disease  antarctica have a uncertain snakes on an band by decreasing the hemisphere of health & helping something has a positive impact on that something -> scavengers help an ecosystem by decreasing the amount of disease