Answer:
La química es la ciencia que estudia la composición, estructura y propiedades de la materia, así como los cambios que esta experimenta durante las reacciones químicas y su relación con la energía.
Explanation:
 
        
             
        
        
        
Sonya has a chronic illness,
and to treat the condition, she takes an antibiotic every day. Despite her
illness, Sonya’s diet is nutritionally adequate, and she exercises regularly. Based
on this information, Sonya may need to <span>take a
dietary supplement that contains vitamin K.</span>
 
        
             
        
        
        
Answer: The troposphere. 
It contains half of the earths atmosphere. Weather occurs in this layer.