Why are mass extinctions
important in earth's history?

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

What does the plate tectonic theroy describe?

East asia’s is dominated by dry highlands and grasslands. a. north and east c. north and west b. south and east d. south and west