Which of the following statements is true? groundwater is the largest available source of freshwater. most of earth's water is found in lakes, rivers, and streams. glaciers are made from frozen ocean water, so they are sources of saltwater. most freshwater is used for public drinking and mining.

Groundwater is the largest available source of freshwater.

Ground water is a water reservoir. It accumulates in the saturated zone of the geosphere. The water accumulates when water from sources like river, lakes, ponds, rainfall, snow melt, and agricultural irrigation gets seep underground by the pores of soil and rocks. It is a largest source of freshwater, as it remains unexposed to the contamination.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.