A. Wedge
and 
B.Screw
A screw is like an inclined plane wrapped around a pole or rod.
and a wedge looks kind of looks like this / and is inclined.
Hope this helps!
Please mark me brainliest! Thanks!
 
        
             
        
        
        
The Answer is TRUE. Hope it helps
        
             
        
        
        
Answer:
A theory changes based on new observations and testing.
Explanation:
A scientific theory is a product of multiple trials and repeated experiments. It usually follows after carefully conducting and testing the validity of the hypothesis. 
A scientific theory provides an explanation into how something behaves. 
A law just states a finding will not explain it. 
Most theories are tenable and can be improved upon when new observations and testing are carried out.