A pie chart helps in easy visualization of data set in order to do a relative study of the share of the different components of any data set represented by a pie chart.
For instance in this case the pie chart shows the contribution of different renewable energy resources as a percentage share of the total renewable energy produced.
Intertidal zone is present between low and high tide and hence, it can be above or below water. The zone is characterized by presence of nutrients and abundant oxygen as well as availability of light. The zone exhibits fluctuations in salinity and temperature as caused by waves.