Which factor is most important in determining which minerals will form in a rock?
a) the size of the rock.
b) the weight of the rock.
c) the hardness of the rock.
d) the composition of the rock..

Which of the following would not be considered a geographic impact on the history of middle and south america? a. the relative geographic isolation of the americas meant that they would be more susceptible to european diseases. b. ernesto “che” guevara's trip throughout south america inspired him to become a revolutionary. c. the tropical climate of north america has encouraged many south american countries to produce goods there. d. the proximity of the united states to middle and south america has strengthened its relationship to the region.