decompose, to break down, spore, a microscopic cell that moves through air to spread, fungus, an organism that reproduces through spores like mold or mushrooms, invade, to take over or occupy aggressively, ecosystem, all the living things that share an environment, alter, to change, formation, a physical arrangement or pattern, species, a group of animals or plants that can breed together, threatened, species at risk of becoming endangered, native, people or species born from a specific location, balance, the right amount of something, smother, to overwhelm or suffocate, monitor, to track or check up on something, propose, to make a suggestion or plan.

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