What circumstances led to the reintroduction of the wolves to the park

As early as the 1930s, scientists were alarmed by the degradation and were worried about erosion and plants dying off. To protect declining species from the shortsightedness of man, the Endangered Species Act was created. In 1974 the gray wolf was added to the list

Explanation:

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igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.