How can you tell igneous rocks apart from metamorphic rocks?

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

He resistance of a liquid to flowing is called

Soil color only reflects the amount of organic matter present in soil.