Question

A high concentration of which substance is indicated by a green coloration of estuarine water?

A.
oxygen
B.
salt
C.
silt
D.
chlorophyll

Answer 1

the answer is d, chlorophyll

Answer 2

The most important light-absorbing substance in the oceans is chlorophyll, which phytoplankton use to produce carbon by photosynthesis. Due to this green pigment - chlorophyll - phytoplankton preferentially absorb the red and blue portions of the light spectrum (for photosynthesis) and reflect green light.