Answer:
Metaphor
<h2>What is a metaphor?</h2>
A figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in "A mighty fortress is our God."
In the sentence, "My son is a greyhound out of the blocks when it's hometime," the son is being compared to this because of how fast he runs to get home.  
Hence, the technique used in the phrase, "My son is a greyhound out of the blocks when it's hometime" is a metaphor.
 
        
             
        
        
        
The answer is "A character".
        
             
        
        
        
Answer:
It contains an analogy and technical language but no allusion
Explanation:
The statements described this are
- Then he rode the bike for a minute, analyzing the change in the bike's performance
- he stared for ten minutes before tightening the rear sprockets.
 
        
             
        
        
        
You would look for a blue sign that says food at the top and it would tell you how many miles to the left or to the right it will take to get to that restaurant, which will also include a bathroom, once you get off the expressway.