Nickel and iron are two main elements synonymous to?​

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

According to the population pyramid, in 2000 china had about 120 million people in which age-group?

Deep-ocean and are created by convergent boundaries of an ocean and continental crust