Which of the Following Is True About the General Geographic

Multiple Choice

Which of the following is true about the general geographic distribution of richness and equitability?

A) Both richness and equitability,and therefore biodiversity,increase from the tropics to the poles.
B) Both richness and equitability,and therefore biodiversity,decrease from the tropics to the poles.
C) Richness decreases from tropical areas to polar areas; equitability may increase toward the poles,but overall,biodiversity decreases from the tropics to the poles.
D) Richness increases from tropical areas to polar areas; equitability may decrease toward the poles,but overall,biodiversity increases from the tropics to the poles.