Answer:
This passage is mainly about asteroids striking Earth.
Explanation:
The presented passage is mostly focusing on asteroids striking Earth. It is something that has been happening since Earth has formed, and it will happen in the future as well. The vast majority of the asteroids don't really have any impact on Earth, but some have an impact that is devastating and long-lasting. 
In the earlier stages of Earth, many more asteroids were falling on the surface, and the main reason for that has been the lack of atmosphere or a very thin atmosphere. As the atmosphere started to take shape and became similar to what is nowadays, the asteroid impacts decreased significantly because the atmosphere was managing to burn them and break them apart. This is not possible with all asteroids though, as some are so big and fall under an angle where the atmosphere doesn't really have any impact on them so when they fall on the surface they are able to cause sudden climatic changes, mass devastation, and mass extinction of species. Such an asteroid will be in a direction to hit Earth in the future for sure, the question remains will humans with their technology be able to prevent an impact or not.
 
        
             
        
        
        
Answer:Espero te sirva
Explanation:La subducción es el proceso de hundimiento de una placa litosférica bajo el borde de otra placa, formándose los llamados límites convergentes entre placas. La placa subducida, la que se hunde, suele estar formada por corteza oceánica, más delgada y densa que la continental. La subducción ocurre a lo largo de amplias zonas de subducción que en el presente se concentran especialmente en el entorno del océano Pacífico, en el llamado cinturón de fuego del Pacífico, pero también hay zonas de subducción en partes del mar Mediterráneo, las Antillas, las Antillas del Sur y la costa índica de Indonesia.
 
        
                    
             
        
        
        
Answer:
The water cycle
Explanation:
All our sources of fresh water, like rivers, wells, and aquifers, are dependent on <u>the water cycle</u> to replenish and maintain themselves.
 
        
             
        
        
        
Hey there! I'm happy to help! 
The countries in the Middle East that export petroleum are Saudi Arabia, Iran, Iraq, United Arab Emirates, Kuwait, Qatar, Oman, and I think there are a few more but those are the main ones. Lots of Middle Eastern countries export it but these are the main ones. Places like Saudi Arabia and Iran have lots of oil fields available, so they would naturally export lots of petroleum.
Have a wonderful day! :D 
 
        
             
        
        
        
Answer:
2
Explanation:
 3 is physical 4 is as well so it has to be 1 or 2