The average composition of a living cell is water \\\\(70-90\\%\\\\); proteins \\\\(10-15\\%\\\\); Nucleic acids \\\\(5-7\\%\\\\);carbohydrates\\\\(3\\%\\\\);lipids \\\\(2\\%\\\\)ions \\\\(1\\%\\\\).So, the correct answer is 'H20 > proteins > nucleic acids > carbohydrates> lipids > ions'.