The correct answer is D. picturesque.
A vivid description is one that is full of detail and makes the reader feel like they are right there experiencing the event. A picturesque description is one that is particularly beautiful or striking. In this case, the boy is giving a detailed description of what happened, and he is also using vivid language to make the scene come alive for the reader. This makes the description picturesque.
The other options are not as accurate. Brilliant means very intelligent or clever, but the boy's description is not necessarily intelligent or clever. Fresh means new or original, but the boy's description is not necessarily new or original. Explanatory means providing an explanation, but the boy's description is not necessarily providing an explanation.
