According to Figure 4

Question

According to Figure 4.30,where would expect primary productivity to be greatest? 
A) Subtropical gyres in the northern hemisphere 
B) Coastal upwelling sites in the middle of the Pacific Ocean 
C) Subtropical gyres found east of South America 
D) Coastal upwelling sites along the northwest coast of South America

Accepted Answer

Coastal upwelling sites along the northwest coast of South America are characterized by nutrient-rich waters brought to the surface by oceanic currents. This increases the availability of nutrients for primary producers, leading to high primary productivity in these areas.