Answer:
Hydrosphere and Biosphere
Explanation:
Hydrosphere refers to all the water bodies that exist on earth. This includes the ocean water, glaciers, and icebergs of the polar region, streams and river water.
The biosphere refers to the region in which life exists and interacts with one another. Overall, it includes the hydrosphere, atmosphere and the earth's surface where they are inhabited by the living species.
The given organism is a worm named 'Mesenchytraeus Solifugus', and when it is studied by scientists, he investigates the two spheres namely the hydrosphere and the biosphere. This helps him in understanding the characteristics of the organisms, the water as well as the atmospheric composition.
