The answer to that would be C...
<span>Worldwide, industry accounts for about 24 percent of all water use, but this is an average amount. Industrial water use can be as much as 70 percent in some highly industrialized European countries or as low as 5 percent in less industrialized countries, such as Bolivia. Most of industrial water is used as a cooling agent for power plants, but unlike agricultural water use, the majority of the water is non-consumptive. Industrial plants usually draw water out of a river or ocean, use it for cooling their equipment, and then return the water to its origins. If care is taken to avoid contamination, the water is not degraded or polluted, and it can be used again for other purpose</span>
Answer: ecosystem
An ecosystem is a community of living and non-living components. A coral reef is an aquatic ecosystem which is formed by a continuous walls of calcium carbonates released by living animals they get combine to form rocks. These rocks and walls are collectively called as hard stony corals. These hard stony corals provide shelter to many aquatic animals like fishes. As the water is the chief abiotic factor along with coral walls and rocks which help in the survival of living organisms therefore, ecosystem is the largest organizational level found in one coral reef.
The answer is B I believe!
C. Over many generations, the characteristics of these kinds of organisms also change
