The basic reason to differentiate between the primary and secondary succession is that why the succession started and how the succession started.
The primary succession takes place on the bare land, rock where there was no plant or animal species present earlier.
The secondary succession takes place when the previously present ecosystem was destructed by the means of human interventions or it occurred naturally.
This shows that why and how the succession started.
Answer - C. The time required for the Succession to Occur
Reasoning - Behind my answer is because the time the succession evolves and grows to build life and progress to improve and expand in each certain time period.
In the population with a large number of individuals, the mutation would only have a small impact, while a population with only 18 individuals would result in a very large i off as the mutation would be in a greater percentage of the population.
