<span>A population's growth is strongly influenced by the proportions of individuals in different age brackets, which in turn is influenced by economic development.</span>
The answer is the last option. both a and b are correct
<span>The formation of Surtsey, a volcanic island off of the southern coast of Ireland. By definition, primary succession refers to when the structure of an ecosystem changes drastically in such a way that it can no longer support organisms. In this case of ecological succession, the formation of the volcanic island creates a new habitat that is unpredicted and is not influenced by any existing ecosystems.</span>
