The context clues that help identify the meaning of the word "vegetation" in the first sentence are "wildland," "forests," "grasslands," and "savannas." These terms suggest that vegetation refers to the different types of plants and vegetation found in natural or wild environments.

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The word "vegetation" in the first sentence can be understood through the context provided by terms such as "wildland," "forests," "grasslands," and "savannas." From this, we can gather that vegetation refers to the various types of plants and greenery present in untouched or untamed settings.