Answer:
Natural selection is a theory originally popularized by Charles Darwin. According to this theory, animals in the natural environment change over time as beneficial traits are preserved, and traits which do not advance the species are slowly weeded out. Natural selection, a concept first theorized by Charles Darwin, is the adjustment of genes throughout generations based on factors that help it survive. Sometimes this is survival of the fittest or the organisms that are better suited to the environment in other ways.
Explanation:
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Answer:
The answers is D option why because when he jumps and goes down with a force and opens parachute so lesser force with his acceleration 
 
        
             
        
        
        
Answer:
The answer to your question is:
Explanation:
1 or more double bonds                                    unsaturated
Usually solid at room temperature                    saturated
Molecules are tightly packed togheter             saturated
Usually liquid at room temperature                  unsaturated
Most plant fats                                                    unsaturated
Most animal fats                                                 saturated