Diamonds and iron, as they can't be easily put back or recreated. Remember to make sure yourself.
Hope this helps :)
        
             
        
        
        
d. Maintain constant velocity
Explanation:
A constant velocity leads to no acceleration. 
Acceleration is defined as the change in velocity with time: 
   Acceleration = 
If there is no change in velocity i.e constant velocity. 
At constant velocity, the change in velocity is 0. 
  If we put zero in the equation above, we will obtain an acceleration value of 0. 
Learn more: 
Acceleration brainly.com/question/3820012
#learnwithBrainly
 
        
             
        
        
        
The pictures are not attached, therefore, I cannot give a specific choice.
However, I will try to help you out.
The angle of incidence is defined as the angle formed between the ray of light and the normal to the surface that the ray is falling on.
The angle of incidence can be shown in the attached image.
Therefore, for your question, choose the image on which the above description applies.
Hope this helps :)
 
        
        
        
Answer:
Obesity does not lead to addiction. Obesity is a weight condition characterized by a body.
Explanation: