The signs and symptoms of a cluster headache include severe<span> right-sided headache with a runny nose, droopy eyelids, and tearing of the eye on the right side. 
</span>The injectable form of sumatriptan<span> (</span>Imitrex<span>), which is commonly used to treat a migraine, is also an effective treatment for acute cluster headache</span>
        
                    
             
        
        
        
Well-sorted sediments have grains of similar size, and are the result of much sediment transport and earth processes which segregated the sediment by depositing different size fractions in different places.
        
             
        
        
        
Answer:
Chemical properties are tested on not because of their color or their appearance but how they will react to certain tests. Such as; is it flammable? Could it be toxic? Physical properties are tested on and observed because of the texture, the color, smell and etc. 
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Answer:
Homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems
Explanation:
(A property of cells, tissues, and organisms that allows the maintenance and regulation of the stability and constancy needed to function properly)
 
        
             
        
        
        
Nature does = environmental stress or changes