Choose the best answer to complelte

1.According to the IUCN Red List, the migratory monarch butterfly was declared __________   due to dams and poaching.
    A.    dangerous    B.    danger    C.    endangered    D.    dangerously
2.Some tourists incline to go hiking along the rough track to challenge themselves and experience __________ and wildlife.
    A.    nature    B.    natural    C.    naturally    D.    native