Answer:
They know that layering, or bedding, is the most obvious feature of sedimentary rocks.  This Law of Superposition is fundamental to the interpretation of Earth history, because at any one location it indicates the relative ages of rock layers and the fossils in them. Layered rocks form when particles settle from water or air. That is kinda easy :D
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Answer:
A. Coal
Explanation:
The other forms listed are "clean" energy sources.
 
        
             
        
        
        
Your answer would A insects because insects are the only invertebrates that can maintain flight. FOr example Butterflies and Flies Can maintain flight
Hope this has helped :)<span />
        
                    
             
        
        
        
Answer: Traditionally in medicine, a vector is an organism that does not cause disease itself but which spreads infection by conveying pathogens from one host to another. Species of mosquito, for example, serve as vectors for the deadly disease Malaria. A vector is a living organism that transmits an infectious agent from an infected animal to a human or another animal. Vectors are frequently arthropods, such as mosquitoes, ticks, flies, fleas and lice. brainliest
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