The chart shows the results of surveys in one African country asking teenagers the main reasons for using their phones between 2016 and 2019. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The provided pie charts illustrate why teenagers use their phone in an African country between 2016 and 2019. It is obvious from the data that "Social Networks" is the main reason of phone use while "Phone Calls" is the last one across the research. Initially, it is clear from the picture that half of the time spent on devices is for "social network", one quarter for "email" and the remaining 15 and 10 percent for "digital camera" and "phone calls". In 2017, "social network" and "email" reasons are slightly decrease while "phone calls" is going a little bit up. In the next year, "social network" and "phone calls" return approximately to the previous percentages and "digital camera" reason move upward reaching to 18%. In the same year, "email" is a less common reason in the teenagers phone use. In 2019, continuing the trend, "social network" represents the majority of phone use with more than 50% while "phone calls" use plummets to 5%. It could be observed from the graphs that digital camera and social network are the most common reasons for the teenagers phone use. The provided pie charts illustrate why teenagers use their phone in an African country between 2016 and 2019. It is obvious from the data that "Social Networks" is the main reason of phone use while "Phone Calls" is the last one across the research. Initially, it is clear from the picture that half of the time spent on devices is for "social network", one quarter for "email" and the remaining 15 and 10 percent for "digital camera" and "phone calls". In 2017, "social network" and "email" reasons are slightly decrease while "phone calls" is going a little bit up. In the next year, "social network" and "phone calls" return approximately to the previous percentages and "digital camera" reason move upward reaching to 18%. In the same year, "email" is a less common reason in the teenagers phone use. In 2019, continuing the trend, "social network" represents the majority of phone use with more than 50% while "phone calls" use plummets to 5%. It could be observed from the graphs that digital camera and social network are the most common reasons for the teenagers phone use.