The correct sequence of events is : C,D,B,A. 
Iron rich magma in the earth's core heats up because of radiation and the pressure exerted by the other layers of the earth. This heat in the crust trigger convection currents in the mantle. The magma closest to the core will be hotter and therefore less dense than other layers. Being less dense the layer will rise towards the crust, eventually becoming cooler and sinking back down in a circular motion. 
The continued circular motion creates electric currents which then generates the magnetic field.
        
             
        
        
        
no direction 
because its electric so there is no smoke produced 
if someone is smoking the it will move in south direction xD
 
        
                    
             
        
        
        
Hi 
The answer is called a mutation
 
        
             
        
        
        
Speciation<span> is the </span>evolutionary<span> process by which biological populations evolve to become distinct </span>species<span>. The biologist </span>Orator F. Cook<span> coined the term 'speciation' in 1906 for the splitting of lineages or "</span>cladogenesis," as opposed to "anagenesis<span>" or "phyletic evolution" within lineages.</span>
        
             
        
        
        
Answer:
Nope!
Explanation:
Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervous system regulates the speed at which food moves through the digestive track.