- If an organism eats something then that something is a source of food to that organism
- Herbivores only eat plants
- So, plants are a source of food to herbivores

- Plants are a source of food to herbivores
- A mouse is a kind of herbivore
- Therefore, plants are a source of food to mice

- Plants are a source of food to mice
- A mouse is a kind of animal
- Food is a source of energy for animals
- Hence, plants are a source of energy to mice

- Plants are a source of energy to mice
- One can get something from a source
- So, mice get energy from plants

Therefore, mice get energy from plants
[Question]In a meadow ecosystem, mice receive most of the energy they need to survive directly from which of the following sources?
[Context]- If an organism eats something then that something is a source of food to that organism 
- Herbivores only eat plants 
- A mouse is a kind of animal 
- One can get something from a source 
- A mouse is a kind of herbivore 
- Food is a source of energy for animals