Option (ख) is correct because the author uses 'मूक-भाषा' to depict human-like consciousness and emotions in the bulls. The context shows Moti expressing his feelings in mute language by saying, 'अब तो नहीं सहा जाता, हीरा!', which reflects human-like tolerance and rebellion. Additionally, another question in the context explicitly links the bulls' anger to a 'मानवीय मनोवृत्ति' (human mentality), confirming that the author's purpose was to show human-like consciousness in the animals.