Final answer:
The realism in The Sage Kuya Invoking the Amida Buddha is demonstrated by the artist rendering speech with six tiny Buddhas representing syllables of a prayer repeating the name of Buddha coming out of the sage's mouth.
Step-by-step explanation:
The realism in The Sage Kuya Invoking the Amida Buddha is demonstrated in the fact that the artist tried to render speech with six tiny Buddhas representing syllables of a prayer repeating the name of Buddha coming out of the sage's mouth. This artistic technique of representing speech visually is a form of symbolism commonly used in Buddhist art. By showing the syllables emanating from the sage's mouth, the artist conveys the idea that the sage is invoking the power and presence of the Amida Buddha through the recitation of the Buddha's name.