Final answer:
The best example of precise and descriptive diction is Option (c) which clearly illustrates the gorilla's size and reaction in a vivid and detailed manner.
Step-by-step explanation:
The BEST example of the use of precise and descriptive diction is option (c): "A four-hundred-pound male gorilla, unaccustomed to tourists, will wildly bolt into the forest, trailing a thick stream of diarrhea, at the mere sight of a person." This choice provides detailed information on the gorilla's weight and behavior, painting a clear and vivid image for the reader. Precisely quantifying the gorilla's weight adds to the specificity, while the description of its reaction to tourists gives a strong visual and emphasizes the level of fear and distress the animal feels.