How did nationalism, colonialism & imperialism, and the Cold War influence the contemporary map of the 20th century?

Which process collects sample soils from particular areas of a site? a.) repetitive sampling b.) restorative sampling c.) random sampling d.) representative sampling

Is water wet? and is fire on fire?

Find the coordinates of a if b(-9,-10) is the midpoint of ac and c has the coordinates of (-1,9)