Which of the following is the best explanation of the fact that ag. production of floodplains is often relatively high? a. on flood plains soils tend to be nutrient-rich and fertileb. on floodplains high water tables make irrigation rich and fertilec. periodic flooding leaches toxic pollutants into floodplain soild. periodic flooding prevents the ph of floodplain soils from becoming too high

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Which outcome is not caused by gravitational forcea. gas and dust come together to form a planet b. planets orbit a star c. two atoms come together to form a molecule d. stars cluster to form a galaxy

Data courtesy of the un development programme 2006-2008 and world bank 2009 the chart above compares measures of development using the hdi and gdp. why might turkey rank lower in the hdi indicator even though it has a high gdp? a. turkey has a lower gdp than comparable countries in the hdi ranking. b. turkey must increase its hdi to have a higher gdp ranking. c. turkey is only compared to other european countries in gdp, not to the world, as it is in the hdi. d. turkey may struggle to provide adequate education or health care, or it may have a lower life expectancy.