- A lawn is a piece of land covered with grass
- Lori uses fertilizer on her lawn
- If fertilizer is used on a land, then the runoff from that land will contain fertilizer
- Therefore, the runoff from the lawn will contain fertilizer

- The runoff from the lawn will contain fertilizer
- A lake is a kind of body of water
- Runoff flows across land and ends in bodies of water
- So, the runoff from the lawn containing fertilizer can flow and end in the lake

- A lake is a kind of body of water
- Algae is found in bodies of water
- Hence, algae can be found in lake

- The runoff from the lawn containing fertilizer can flow and end in the lake
- Algae can be found in lake
- Fertilizers have a positive impact on algae growth
- So, the population of algae in the lake will increase because of the fertilizer in the runoff

Hence, the population of algae in the lake will increase because of the fertilizer in the runoff
[Question]Lori owns a house next to the lake. She uses lots of fertilizer to keep her lawn green. Which impact could fertilizing her lawn have on the lake?
[Context]- A lake is a kind of body of water 
- A lawn is a piece of land covered with grass 
- Fertilizers have a positive impact on algae growth 
- Algae is found in bodies of water 
- Lori uses fertilizer on her lawn 
- Runoff flows across land and ends in bodies of water 
- If fertilizer is used on a land, then the runoff from that land will contain fertilizer