- Disrupting something from reaching something else decreases the availability of that something
- Smoke from volcanic eruptions can disrupt sunlight from reaching earth 's surface
- Therefore, smoke from volcanic eruptions can decrease the availability of sunlight

- Smoke from volcanic eruptions can decrease the availability of sunlight
- As the availability of sunlight decreases , the ability of producers to produce food decrease
- So, smoke from volcanic eruptions can decrease the food produced by the producers by decreasing the availability of sunlight

- Smoke from volcanic eruptions can decrease the food produced by the producers by decreasing the availability of sunlight
- Food is a kind of resource
- Hence, smoke from vocanic eruptions can decrease resources in an area by decreasing the availability of sunlight

Hence, smoke from vocanic eruptions can decrease resources in an area by decreasing the availability of sunlight
Question: In the geologic past, abiotic factors such as volcanic eruptions have had an impact on the availability of resources. How can volcanic eruptions impact the availability of resources?
Context: - Disrupting something from reaching something else decreases the availability of that something 
- As the availability of sunlight decreases , the ability of producers to produce food decrease 
- Smoke from volcanic eruptions can disrupt sunlight from reaching earth 's surface 
- Food is a kind of resource