Answer:
Nyctophobia 
Explanation:
Nyctophobia is known as the fear of darkness 
 
        
                    
             
        
        
        
<h2>Operational </h2>
Explanation:
The operational definition is the description of a specific process, or set of validation tests, accessible to more persons than the definer (i.e., said to be publicly accessible), where it can be repeatedly measured or tested
Operational definitions are also used to define system states or (nonspecific) physical objects by the description of a specific process of preparation which can be repeated
For example in the given example experimenter is using the case of hitting a punching bag to measure the level of aggression in someone 
 
        
        
        
The right answer is True.
At the global level, climate change will contribute to the disruption of the Earth's natural ecosystems, which could lead to the extinction of wild animal species and plants. It is mainly the impact of climate change on habitat and ecosystems that will dictate the impacts on biodiversity (by expanding them or the opposite).
Climate change will profoundly affect agricultural and forestry production. The effects in terms of production potential will be very variable depending on the regions and plant cover. They can result in an overall tendency for moderate stimulation in temperate climates and for limited warming at 2 ° -3 ° C.
 
        
                    
             
        
        
        
B. an atom
Atoms are the basic units of matter and the defining structure of elements.
        
             
        
        
        
Are you asking which cell is referred to as a sugar factory? That would be (in plant organisms) chloroplasts