If if the nutrients available in an environment decreases, then animals may leave to find them, then what do animals do when the available nutrients in an environment decrease?

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

 

   they leave to find them       