The correct answer is - species.
The extinct Caribbean monk seal was a species of seal that lived in a relatively small area in only one prat of the planet. Also, this species lived in waters that are not typical for the other seals. Because the Caribbean monk seal was isolated from the other species of seals, its genes over time became different enough from the other types of seals so that they can not mate and produce offspring between each other. While the isolation made it a unique type of seal, it was also very unfortunate because it meant that it can not be saved, at least in a mixed form, by mating with other seals, so this species of seal went extinct.
 
        
                    
             
        
        
        
<h3>Answer is: Scientific <em>Experiment</em></h3>
        
                    
             
        
        
        
Answer:
Option D, Tdap today; Td in 4 weeks; Td 6 months after the second dose
Explanation:
In general, Tdap is given before Td to all those adults who have never been administered with Tdap earlier.  
Also as per the publication of CDC, any individual who is of 7 years or older than this and has never been vaccinated by Td needs following schedule of medication  
a)	First primary dose
b)	After the first primary dose the second primary dose of Td must be given in 4 weeks and  
c)	The third primary dose must be given after 6 to 12 months.
Hence, option D is correct