Which of the following best describes the changes that take place in an ecosystem during primary succession?
Lichens and mosses grow slowly on newly formed land, followed by grasses, shrubs, and trees.
Shrubs and trees regrow quickly in areas that have been disturbed by a forest fire.
Organisms compete for resources, and those that are best fit to survive establish themselves as the dominant species.
Natural disasters cause many populations to migrate to a new location in order to survive.
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Is the answer A?
You're right. Primary succession occurs in an environment where new substrate is devoid of vegetation and other organisms and usually lacks soil, such as a recent lava flow or area left from retreated glacier. It is one of two types of biological and ecological succession of plant life. In our case, pioneer species like lichen, algae and fungi as well as other abiotic factors like wind and water start to fertilize the habitat.