Answer:
<em>The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter.</em>
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I think the answer would be C let me know if I’m wrong I’m pretty sure though
        
                    
             
        
        
        
Answer and explanation:
The sun's core is so hot that there is so much pressure that nuclear fusion takes place. Hydrogen is changed to helium and nuclear fusion creates photons (light) and heat. 
 
        
             
        
        
        
Rome was located<span> 15 miles up the Tiber River in order to protect the city from being raided by pirates. This also provided a source of water and a waterway to the Mediterranean Sea. The city was built on seven steep hills that allowed Romans to defend the city against enemies.</span>
        
                    
             
        
        
        
The appropriate answer is a. A low-pressure system. Low-pressure systems are associated with cloud cover, thunderstorms and relatively high winds. The lower the pressure in the system the higher the wind speed. Examples of low-pressure systems include hurricanes, tropical storms, depressions and cold fronts. High-pressure systems such as anti-cyclones bring fair weather with relatively calm conditions.