The feature of Earth that is part of the geosphere is "rocks." Explanation:
- The geosphere includes all the solid parts of the Earth, such as the crust, mantle, core, and the rocky surface features.
- It encompasses rocks, minerals, soils, and the physical landforms.
- Air belongs to the atmosphere, fish are part of the biosphere (living organisms), and glaciers are part of the cryosphere (frozen water), which is related to the hydrosphere.
- Therefore, among air, fish, rocks, and glaciers, only rocks are part of the geosphere.
