You are presented with the question "What do animals do when the available nutrients in an environment decrease?" and the following answer choices: 
- basic building blocks of life
 - depress neuronal excitability
 - they leave to find them
 - they plant seeds
 - they stay
 - Plant growth is reduced
 - they live like normal
 - body temperature reduces

Now knowing that if the amount of available food and water decreases in an environment then animals may leave that environment to find food and water and food and water provided to patients by mouth is the usual means of providing nutrition to patients, choose the best answer.


 

   they leave to find them      