The chart shows the results of surveys in one African country asking teenagers the main reasons for using their phones between 2016 and 2019

The pie chart illustrates the survey results in one Africa country and compare the main cause for youths using their phone from 2016 to 2019
Overall, teenagers was used of social networks on high demand whereas the usage of phone calls was on low demand.
Firstly, the main reason teenagers using their phone was social networks and the used was 50% in 2016 and the usage of email and digital camera were 25% and 15% respectively while the phone calls was only 10% used in 2016. Additionally, the running of social networks and email were decreased 2% and 1% respectively however, the used of digital camera was same in 2017 while, the phone calls was increased 2% in the period of 2017
Secondly, in 2018 the used of social networks was 51% and it was increased 4% in 2019 although the email and phone calls were declined in 2019 and digital usage was 2% increase in the year of 2019.