Question

Which of the following phrases describes a typical river mouth?
a.
clearer water with high levels of oxygen
b.
decreased vegetation and lower oxygen levels
c.
increased species diversity
d.
high levels of vegetation

Answer 1

c. Increased species diversity.

River mouths/estuaries are nutrient-rich, highly productive transition zones (mixing fresh and salt water) that support many habitats and act as nurseries, so they typically have high species diversity.