This means that the hardness of rock material is partly related to its ability to withstand erosive forces of wind, water and ice in a particular climate.
(This; means; that the hardness of rock material is partly related to its ability) Context(This means,List([0, 10))):(the hardness of rock material; is partly related; to its ability)
This means,List([0, 10))
This the hardness of rock material
means is partly related
that the hardness of rock material is partly related to its ability
to its ability