Answer: D, to create the soil
Explanation:
Primary succession occurs on basically empty, lifeless land with no soil. Pioneer species are the first plants to colonize the land after primary succession, which means they are very primitive and can survive without soil. Since there is no soil, their role is to create soil for more advanced organisms to survive in the area in the future.
<span>The genetic term used to describe an observable trait is phenotype. More specifically phenotype is the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.</span>
