improving for both men and women. so the answer should be C.
C. Atmosphere - which is the one sphere that means "air" or "gasses". The other ones mean, Biosphere = "living", Lithosphere = "land", and Hydrosphere = "water"
Glaciers cause erosion by abrasion and [plucking].
The sediment deposited by glaciers is called [till].
When a chunk of ice left behind by a receding glacier melts, the water stays in the kettle, forming a [kettle lake].
The exploration and scientific study of the ocean and its phenomena.