The heart is beneath the breastbone in the chest cavity of the frog
        
             
        
        
        
Answer:
Carbon Cycle: the series of processes by which carbon compounds are interconverted in the environment, involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels.
Explanation:
 
        
                    
             
        
        
        
Limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.
<h3>
Describes a drawback in the scientists' plan?</h3>
The big disadvantage of tidal power is that there are limited installation sites for it. It is expensive as well as the turbines can adversely impact the surrounding ecosystem.
So we can conclude that limited installation sites best describes a drawback in the scientists' plan because tidal energy is not present everywhere.
Learn more about energy here: brainly.com/question/13881533
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Why is your question in Biology section, it should be in mathematics or in physics but that's OK
The answer of A is - 21.6666666666 or 21.7 
The answer of B is - 21.6666666666 or 21.7 
the answer of A and B are equal because speed and velocity is the same thing