Fact 1: Neurons are the structural and functional units of the nervous system.

Fact 2: Botulism affects the nervous system.

Given the two facts above, answer the question "Which of the following affects neurons?" with the following options: 
- nerves
 - voltage
 - Dehydration
 - electrically
 - heat
 - Botulism
 - fever
 - temperature


 

      Botulism   