The line chart indicates typical days' demand of electricity in England during winter and summer, and the pie chart shows the proportion of each energy-using item take in the whole electricity consumption.
This line chart, to be specific, the fluctuation of typical daily demand of electricity in summer, changes slightly, varying between 17000 units and 20000 units. Moreover, change tendency of winter's electricity demand shares the similar pattern of that of summer, ranging from about 30000 units to 44000 units, but is more significant. Interestingly, the gap between two periods' typical daily demands, keeping stable, in around the umber of summer's at the exactly same time in a typical day.
The pie chart, reveals that heating rooms and water, the main electricity-consumption item, outweighs the sum of three remaining items, up to 52.5%. And the proportion of three other ones, are so similar that nearly share a same figure.
Overall, it is probably that electricity used for heating rooms and water, mostly contributes to the growth of energy demand in winter.