- Eating something decreases the amount of that something
- Scavengers eat dead organisms
- Therefore, 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
- So, 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
- Therefore, scavengers decrease the amount of disease

- Decreasing something negative has a positive impact on a thing
- Disease has a negative impact on an organism
- Hence, decreasing disease has a positive impact on organisms

- Decreasing disease has a positive impact on organisms
- An ecosystem contains a large community of / large numbers of living organisms
- Hence, decreasing disease has a positive impact on an ecosystem

- Scavengers decrease the amount of disease
- Decreasing disease has a positive impact on an ecosystem
- Hence, 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
- Helping something has a positive impact on that something
- So, scavengers help an ecosystem by decreasing the amount of disease

Hence, scavengers help an ecosystem by decreasing the amount of disease
Question
Vultures are scavengers that most likely help ecosystems by quickly consuming dead organisms and

Context
- Eating something decreases the amount of that something 
- Dead organisms are a source of disease 
- Scavengers eat dead organisms 
- Decreasing something negative has a positive impact on a thing 
- An ecosystem contains a large community of / large numbers of living organisms 
- Helping something has a positive impact on that something 
- As the amount of a source of something decreases , the amount of that something will decrease 
- Disease has a negative impact on an organism