- An organism becoming extinct causes a change in the organism 's food web
- A change in a food web can cause damage to an ecosystem
- Hence, extinctions of organisms can cause damage to an ecosystem by changing the food web

So, extinctions of organisms can cause damage to an ecosystem by changing the food web
Question: When hunting by humans causes a species to become extinct, this may produce damaging effects throughout the ecosystem of the extinct species. What is the cause of this damage?
Context: - An organism becoming extinct causes a change in the organism 's food web 
- A change in a food web can cause damage to an ecosystem