relatively thin layer of rock found above Earth's mantle relatively thin layer of water covering most of Earth's crust hot liquid rock located in Earth's outer core very dense rock located in Earth's inner core
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Earth's hydrosphere is best described as the
Possibilities:
- relatively thin layer of rock found above Earth's mantle
- relatively thin layer of water covering most of Earth's crust
- hot liquid rock located in Earth's outer core
- very dense rock located in Earth's inner core

relatively thin layer of water covering most of Earth's crust