Answer:
D. bacteria feeding on the large volume of carp feces depleted the oxygen
Explanation:
In the context, it is given that in a small farm pond, the owner added 20 grass carp and feed them with the abundant plants and algae that is found on her pond. The carp grew large after many years but one summer the owner found the grass carps along with other fishes were dead.
The most possible explanation for the dead of the fishes in the pond because the bacteria feeds on the carp feces which depletes the dissolved oxygen present in the water. Thus the fishes could not breathe and were finally dead.
Therefore, the correct option is (D).
The average intensity received on the Earth's surface is 
where R is the distance of the earth from the sun.
![I=4*10^{26}/4\pi *[150*106*10^{3}]^{2}](https://tex.z-dn.net/?f=I%3D4%2A10%5E%7B26%7D%2F4%5Cpi%20%2A%5B150%2A106%2A10%5E%7B3%7D%5D%5E%7B2%7D)
What is the meaning of the intensity of sunlight?
Sun intensity refers to the amount of incoming solar energy, or radiation, that reaches the Earth's surface. The angle at which the rays from the sun hit the Earth determines this intensity.
What is the average intensity received on the Earth's surface?
The average intensity received on the Earth's surface is given by:
Thus, the average intensity received on the Earth's surface is
To know more about the intensity received from the sun:
brainly.com/question/29579262
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The molecules making up object collide with the molecules of the other and some of the kinetic energy from a warmer object is transferred to the cooler one.
