Respiratory system ?. Or esophagus?
        
                    
             
        
        
        
Answer:
For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!
 
        
             
        
        
        
Answer:
To maintain their Skills
Explanation:
The main job of video editor and film editor is to gather the raw material related to some particular topic that is provided by camera person. With the help of skills the video editor convert that raw video into finished product that will be able to broadcast.
That is the reason, he should maintain his skills to preform the video editing task accurately. 
 
        
                    
             
        
        
        
Answer:
The answer to this question is given below in the explanation section. 
Explanation:
The correct answer to this question is A: counter module.
Counter module in python or Python counter is a container that holds the count of each of the elements present in the container. It is a sub-class available in the dictionary class. Jamal can use this module in Python to write a program that will find the 10 most common words in Romeo and Juliet. 
Other options are not correct because:
While loop: while loop only iterates its body until a specific condition is met. For loop is used to iterate to a pre-specified condition and iterate until the condition is reached. While the mean module of Python is used to calculate mean and average. 
 
        
             
        
        
        
Mobile app designers often start app design with sketches on paper. ... Creating wireframes is a quick and cost-effective approach for designing app layouts and iterating through them in the design review process. While creating wireframes you should consider device specific design.