National parks protect endangered species from:National parks protect endangered species from:

Parks manage habitat to protect species, especially endangered and threatened species. National seashores like Point Reyes National Seashore set aside beach habitat for endangered nesting shorebirds and limit the activities that can occur there to help protect the birds while they are raising their offspring.

Explanation:

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option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).