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B limestone

Explanation: Karst area provide supply of water through springs and wells to thousands of household. This type of landscape usually develops on limestone . It can also develop on various types of rocks, such as gypsum, dolomite and salt.

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.

layer 3 is younger than layer 6.