Question 9-12 are based on the following passage.  

   
    Although oft-maligned in modern culture, the pigeon once stood not only for speed and reliability but also for grace and beauty. Darwin himself became a pigeon fancier after beginning to work with the humble Columba /via, discovering them to be more fascinating than he had formerly believed. During the Victorian age, in fact, raising show pigeons was a popular hobby, with new breeds continuously arising as amateur (and not-so-amateur) ornithologists crossed animals in the hopes of creating ever more fantastic creatures. One of the most sought-after varieties was known as the Almond Tumbler a name presumably derived from the color of the birds combined with the distinctive flight style. Over the course of many generations, this bird was so manipulated as to have a beak so small as to prevent the adult/birds from feeding their offspring. And yet, it was wildly popular, drawing high prices at auctions and high prizes at competitions. 

    How then did an animal once so well-loved come to be so loathed? As recently as World War II, the military used pigeons to carry messages. but today. Many people would kick a pigeon before they would feed one. Perhaps it is just a problem of population density. a lack of esteem for that which is ubiquitous. Pigeons have become our constant urban companions and, as such, have been transformed from symbols of peace, plenty, and prosperity, to representatives of disease and decay.

The case of the Almond Tumbler is most analogous to which of the following?