Only about % of the water on Earth is potable (suitable for humans to drink). Of this water that is potable, only about 30% is in the form of ground water.
On the surface of the planet only % of water is freshwater in the forms of lakes and streams.
Areas with low availability of drinking water are said to be water .
Ideas to reduce water stress in preparation for the anticipated shortages include:
→ pollution in rivers and lakes
→ using water conserving technology
→ perfecting desalination plants to process undrinkable water into drinkable fresh water

only about 0.3%and the plant is 99.7 and the 3 one is 0.3 unattainable.

Explanation i hope the

the statement is true

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.