Factors that have the greatest effect on how much freshwater is available over time?

climate, geology, abstraction, poverty

Explanation:

Climate: lack of precipitation can lead to a lack of water. That is why is rain is important.

Geology can also be a factor in the availability of water. When water goes under the ground, rocks let the water enter through and make a water depot that is saved underground.

Regular cleaning of the water. Even though in some places there is enough water because of the pollution, it can’t be used.

Abstraction: it is important to have a limit when using water. If the amount of water for use is smaller than the water we get through precipitation, the quantity will be balanced.

When the country is rich, it can provide regular water inspection, while in poor countries this can be a big problem.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

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.