<span>The Flu is not considered to be one of the four main diseases
caused by environmental factors according to the WHO. The World Health Organization is the organism of the
Organization of the United Nations specialized in managing policies of
prevention, promotion and intervention in health worldwide.  It was established on 07 April 1948 headquartered in
Geneva, Switzerland.</span>
        
             
        
        
        
This question is missing the options. I've found the complete question online. It is as follows:
Herzberg's research identified several _________ factors that did not necessarily motivate employees if they were increased, but could cause employees to become dissatisfied if they were missing or inadequate.
A. inferior
B. hygiene
C. negative
D. retroactive
Answer:
The correct answer is letter B. hygiene.
Explanation:
There are several theories that concern motivation in the workplace. Herzberg's theory is known as the two-factor theory because of the two factors identified as the cause of either motivation or dissatisfaction. According to Herzberg, motivation is caused by motivators, which are more intrinsic, concerning the job itself (achievement, responsibility, recognition, growth, etc.). On the other hand, hygiene factors (salary, security, supervision, work conditions etc.) are more extrinsic to the workers. They do not motivate, but their absence causes workers to be dissatisfied.
 
        
             
        
        
        
Maybe mesopotamia
Sorry if I answer the wrong answer
        
             
        
        
        
The type of social rule where most people talk quietly when going into a library because is called norm.
<h3>What is social rule?</h3>
Social rules are rules that every member of the society are expected to abide with. These rules are standard rules in which people live by and not enforced by law.
Social rules are essential because certain rules have been shared by the society which must be followed. The social rules are correct and acceptable behaviour in the society
Hence, the type of social rule where most people talk quietly when going into a library because is called norm.
Learn more about social rule here : brainly.com/question/25766089