The correct answer is letter E
The world population consists of the total number of inhabitants of planet Earth, an amount that reached, in 2013, the mark of 7.2 billion inhabitants, according to data released by the United Nations Population Fund (UNFPA).
The pace of population growth has been decreasing every year. According to estimates by the United Nations (UN), the Earth will have just over 9 billion inhabitants in 2050, growing at an annual rate of only 0.33% per year, considered lower than the current rate (2.02%).
