Answer: The most common unit is the watt (W), defined as 1 joule (J) of energy per second.
I do not know if this answer this question but I try my best
 
        
             
        
        
        
The United States is the biggest source of foreign aid. The plans developed are primarily intended for economic development. Other goals are fighting disease, backing up neighboring countries and implementing disaster relief. Although, evaluation of its effectiveness might sometimes be volatile. The measure of its effectiveness could be based on how its purpose was accomplished effectively. 
        
                    
             
        
        
        
The correct answer is D) Communication.
<em>At the Corpus Callosum, communication occurs between the two hemispheres.  </em>
Because the human brain has two hemispheres that need communication, both need permanent Exchange of information to efficient. The Corpus Callosum is the largest fiber bundle that connects the right hemisphere with the left hemisphere, and it has a very important role in the process because it serves as a line of communication for the individual to perceive things.
 
        
                    
             
        
        
        
Answer:
c. the digital divide
Explanation:
The digital divide - 
It refers to the non - uniform distribution of the services of internet between the people of various class and groups , is referred to as the digital divide . 
The various groups can be divided on the basis of geopolitical criteria , geographical and social area . 
The information and communication technology is very costly , and hence , not everyone can afford to use it .
Hence , from the given information of the question, 
The correct option is  the digital divide .