Concept:The hydrosphere refers to all the water present on or near the Earth's surface.
Explanation:The Earth's crust is not only made of land but is also covered by large water bodies.
These water bodies include oceans, seas, lakes, rivers, and groundwater.
The continuous layer of water covering the Earth's surface is called the hydrosphere.
The other options do not match this definition.
Sial is the upper continental crust, atmosphere is the layer of gases, and stratosphere is a layer of the atmosphere.
Answer:The correct answer is D. hydrosphere.