- Pollination requires pollinating animals
- Plant reproduction requires pollination
- So, plant reproduction requires pollination by pollinating animals

- Plant reproduction requires pollination by pollinating animals
- A plant is a kind of living thing
- If a living thing requires something then that something has a positive impact on that living thing
- Hence, pollination by pollinating animals has a positive impact on plant reproduction

- Pollination by pollinating animals has a positive impact on plant reproduction
- An insect is a pollinating animal
- Hence, pollination by insects has a positive impact on plant reproduction

- Pollination by insects has a positive impact on plant reproduction
- Crops are a kind of edible plant for eating
- Therefore, pollination by insects has a positive impact on crop reproduction

- An animal / living thing requires nutrients for survival
- An animal needs to eat food for nutrients
- Hence, an animal needs to eat for survival

- An animal needs to eat for survival
- Humans eat crops
- A human is a kind of animal
- Hence, humans are animals that can eat crops for survival

- Humans are animals that can eat crops for survival
- If an animal does something for survival then that something has a positive impact on that animal's survival
- Hence, eating crops has a positive impact on a human's survival

- Pollination by insects has a positive impact on crop reproduction
- Eating crops has a positive impact on a human's survival
- Hence, insects can have a positive impact on humans by pollinating crops

- Insects can have a positive impact on humans by pollinating crops
- Some crops are flowering plants
- Hence, insects can have a positive impact on humans by pollinating flowering plants

Therefore, insects can have a positive impact on humans by pollinating flowering plants
Question
Which of the following is an example of how insects are beneficial to humans?

Context
- Pollination requires pollinating animals 
- Some crops are flowering plants 
- Humans eat crops 
- A human is a kind of animal 
- If an animal does something for survival then that something has a positive impact on that animal's survival 
- A plant is a kind of living thing 
- If a living thing requires something then that something has a positive impact on that living thing 
- An insect is a pollinating animal 
- Crops are a kind of edible plant for eating 
- An animal / living thing requires nutrients for survival 
- Plant reproduction requires pollination 
- An animal needs to eat food for nutrients