Wild animals and plants refer to animals or plants that originate from the wild environment themselves or the parents of the previous generation, or that are obtained by artificial breeding or artificial cultivation, but still, need to introduce the individual genes of the wild from time to time. According to the above definition, which of the following is wild animals and plants? ['"Pingping", a panda cub born recently at a giant panda protection base, whose parents are second-generation pandas artificially bred at the base.', 'Scientists carried out a large number of cultivation experiments and successfully obtained the northern Cordyceps Sinensis, an ideal substitute for wild Cordyceps Sinensis.', 'Environmental workers go to the wild to look for wild crocodile eggs or injured adult crocodile and drop them in the crocodile reserve.', 'The second-generation Chinese sturgeon artificially cultivated spent the young in the protection base, and was released into the wild in adulthood.']