Metallic bonds are responsible for many properties of metals, such as conductivity. This is because the bonds can shift because valence electrons are held loosely and move freely. That is option C.
<h3>What are metallic bonds?</h3>
Metallic bonds are defined as those bonds that causes the electrostatic attraction between metal cations and delocalized electrons of another metallic substance.
The characteristics of a metallic compound with metallic bonds include the following:
- thermal and electrical conductivity, 
The metallic bonds of these metallic atoms gives them conductivity features because the electrons from the outer shells of the metal atoms are delocalised , and are free to move through the whole structure.
Learn more about metals here:
brainly.com/question/4701542
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Because it’s made of metal. And metal is a good conductor
        
                    
             
        
        
        
To solve this problem we will apply the concepts related to the Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. Mathematically it can be described as

Here,
 =frequency received by detector
=frequency received by detector
 =frequency of wave emitted by source
=frequency of wave emitted by source
 =velocity of detector
=velocity of detector
 =velocity of source
=velocity of source
v=velocity of sound wave
Replacing we have that, 


Therefore the frequencty that will hear the passengers is 422Hz
 
        
             
        
        
        
The answer would be erin out of all of them thank me later :)