When a 3D scene is published from ArcGIS Pro to ArcGIS Enterprise as a hosted scene layer, the data is stored in the tile cache data store. This data store is specifically configured to manage the caches for hosted scene layers and tile layers. Scene layers are pre-generated caches (in the I3S/SLPK format) optimized for fast visualization of large 3D datasets over the web. The tile cache data store provides a highly scalable, file-based storage solution required for these caches.

B. Relational: The relational data store is used for storing the data of hosted feature layers, not the caches for scene layers.

C. Raster: Raster is a data format, not a type of ArcGIS Data Store. While raster data can be published as a tile layer, its cache is stored in the tile cache data store.

1. Esri ArcGIS Enterprise Documentation. "An overview of ArcGIS Data Store." ArcGIS Enterprise 11.2 Documentation. This document explicitly states: "Tile cache data store—Stores caches for hosted scene layers."

2. Esri ArcGIS Enterprise Documentation. "Data stores used with ArcGIS Server." ArcGIS Enterprise 11.2 Documentation. This resource details the different data store types and their specific functions

clarifying that the tile cache data store is for scene layer caches.

3. Esri ArcGIS Enterprise Documentation. "Publish hosted scene layers." Portal for ArcGIS 11.2 Documentation. This guide explains the publishing workflow and notes: "The cache for the scene layer is stored in the tile cache data store that is registered with the portal's hosting server."