Which service is applicable to analyze data insights for Instagram images?

Visual Recognition is the correct choice for analyzing data insights for Instagram images. This service is specifically designed to classify images, recognize objects, and detect scenes within visual content. By employing machine learning techniques, Visual Recognition can identify various attributes relevant to images, such as clothing styles, landmarks, or even emotions conveyed through visual cues.

This makes it particularly suitable for applications involving social media images, where understanding visual context is crucial for gathering insights and making data-driven decisions. It can assist in evaluating user engagement by analyzing aesthetic elements or identifying popular trends through imagery on platforms like Instagram.

Other options like Discovery focus on gathering and organizing large volumes of structured and unstructured data, which is not specific to image analysis. Conversation and Natural Language Understanding are geared towards processing and analyzing textual information and dialogue, making them unsuitable for direct analysis of images.