The answer is the last one because:
- One has three sides and the other has four which doesn't makes it equal.
- One has three vertices and the other has four vertices.
- Obtuse is an angle greater than 90° but less than 180°, so it doesn't have an obtuse angle.
- Yes, it has one right angle each.
 
        
                    
             
        
        
        
Develop renewable resources, improve agricultural methods, improve fuel efficiency, and reduce petroleum use
        
                    
             
        
        
        
Hi there!
To define gravity in a way you can understand, gravity means the force of something acting upon something else to bring it down back to the ground.
For example, gravity is what pulls us to the ground when we jump in the air. You can't just jump in the air and stay in place, right?
Another good example is if there was a spaceship directly in between the Earth and the Moon, it would very very very slowly go toward the earth because of its gravitational pull on the spaceship.
Hope this helps! :D
Remember, just message me if you need anymore help on anything!
 
        
                    
             
        
        
        
Answer:
Option (C)
Explanation:
Coquina is usually defined as a sedimentary limestone rock that is found to be present in the freshwater zones and in the coastal areas. This rock is made up of broken shells that are smaller in size. The rocks can be easily broken down by the constant flowing of sea waves.  
This rock is commonly formed in the same way as the other sedimentary rocks, i.e. it is formed by the deposition of sediments carrying these organic remains and eventually undergoes the process of compaction and lithification on the seafloor.
Thus, the correct answer is option (C).