Which of these types of ''bantam'' chickens was created as an ornamental by selective breeding?

Selective breeding is the process by which humans use animal breeding to selectively develop particular characteristics. Domesticated animals are known as breeds. Two different breeds produce a crossbreed. Sir John Saunders Sebright was the 7th Baronet and a member of Parliament for Hertfordshire, England. His 1809 pamphlet on the Art of Improving the Breeds of Domestic Animals was extensively regarding ''Sebright bantam'', which is a British breed of bantam chicken. Charles Darwin read this pamphlet and was impressed with a passage that elaborated on how the weak and the unhealthy do not live to propagate their infirmities. It is a true bantam chicken naturally small and has no large counterpart. It is named after Sir John Saunders Sebright, who created it as an ornamental breed by selective breeding in the early nineteenth century. As a true bantam, males weigh an average of 22 ounces (620gms) and females 20 oz (570gm).

Sir John set out to create a very small bantam chicken (cf laced Police). It is thought that he created the gold Sebright by cross-breeding. He later created the silver Sebright by crossing his golds with a white Rosecomb Cock. As a largely ornamental chicken, Sebright lay tiny, white eggs and are not kept for meat production. In accordance with the intentions of their creator, the Sebright is commonly seen in competitive poultry shows.