3976
Each causative organism has a species - specific preference and requirement for temperature , salinity , pH , the basic nutrients , and growth factors , and the toxin formation is affected by these environmental factors .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities:  
Answer:
 None