What is the turning point of this article?

Describe how ocean currents can affect a moving object ❕❕❕

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare

Based on current rates the earths human population is expected to grow how much by 2050