Answer:
 you don't earn money while volunteering 
volunteering aboard can be expensive 
many volunteers have too high expectations 
Explanation:
I searched it up and took time to read 
 
        
             
        
        
        
Answer:  "accommodation".
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It is an example of directional selection.
The different kinds of natural selection can influence the distribution of phenotypes within a population. In stabilizing selection, an average phenotype is preferred.
In directional selection, a modification in the surrounding changes the spectrum of the observed phenotypes, and in diversifying selection the extreme values for a trait are preferred over the transitional values. This kind of selection usually pushes speciation.
The directional selection, in the field of population genetics, refers to a mode of natural selection in which an extreme phenotype is preferred over other phenotypes, making the allele frequency to change with time in the orientation of that phenotype.
 
        
             
        
        
        
D is the answer. Since it’s caused by a subduction.