I'm Not Good English I'm Korean

Which term defines one's age as measured by how well the body is working? chronological age biological age social age mental age

Yuan is a firefighter who provides basic first aid at accident scenes. yuan is an emergency medical

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