Subsets of {dog, cat, fish} are Ф, {dog}, {cat}, {fish}, {dog, cat}, {dog, fish}, {cat, fish}, {dog, cat, fish}.
<span>The answer is that in these ecosystems, climax community may not occur. Ecological succession is the gradual process in which ecosystems change and develop over time, thus nothing remains the same and also the habitats are constantly changing. There are two main types of biological successions;primary succession which is an opening of a pristine habitat and the secondary succession which is a response to a disturbance.</span>
The correct answer is: [A]: "beach grass" .
The other answer choices are incorrect, since they would be examples of abiotic factors. Furthermore, it is complete logical that "beach grasses" would influence coastal plains (e.g. be part of vegetation of sand dunes); and "beach grass" is a plant— a "biotic factor".
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I'm going to say be because different malls can't survive in different environments
The answer is C hope that helped.