- A field is a kind of environment
- As the supply of food in an environment decreases , the population of animals in that environment will decrease
- Therefore, as the supply of food in a field decreases, the population of animals in that field will decrease

- A mouse is a kind of animal
- Mice live in in holes under the ground in fields / in forests
- Therefore, a mouse is a kind of animal that lives in fields

- As the supply of food in a field decreases, the population of animals in that field will decrease
- A mouse is a kind of animal that lives in fields
- So, as the supply of food in a field decreases, the population of mice in that field will decrease

So, as the supply of food in a field decreases, the population of mice in that field will decrease
Q: If its food supply in a field decreases, the mouse population in that field will probably
Context:
- A mouse is a kind of animal 
- A field is a kind of environment 
- Mice live in in holes under the ground in fields / in forests 
- As the supply of food in an environment decreases , the population of animals in that environment will decrease