The colors of stained glass are metallic oxides (combinations of different metals and oxygen), but the beautiful colors you see aren't
due solely to the coloring in the glass. It's the light passing through
the glass that reaches your eyes. The natural light changes from
morning to night, even from moment to moment. Our perception of
stained glass changes with the light.

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answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation: