Final answer:
Pioneer species like mosses and lichens are the first to colonize newly formed environments, facilitating the transition to a thriving ecosystem.
Explanation:
Pioneer species, such as mosses and lichens, are the first organisms to colonize a barren environment like that after a volcanic eruption. They are able to withstand harsh conditions, help break down rocks into soil, and create a foundation for other species to establish themselves. Over time, pioneer species pave the way for more complex plant and animal life, eventually leading to a diverse ecosystem.
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