You are presented with the question "What relies on grass as a food source?" and the following answer choices: 
- Bacteria
 - Soil
 - humans
 - More grass
 - perennials
 - alpacas
 - Animals
 - tortoises

Now knowing that grasses supply most of the food consumed by people worldwide and grasses are an important source of food for people as well as animals, choose the best answer.


 

       Animals  