Final answer:
The correct option to complete the sentence is 'cotorra' because it refers to a bird that makes singing sounds.
Step-by-step explanation:
The correct option to complete the sentence is 'cotorra'.
Mi cantaba por las mañanas en el árbol de mi jardín.'mi' doesn't make sense in this context, 'león', 'oso', and 'rana' are all animals, but 'cotorra' refers to a specific kind of bird that makes singing sounds. Therefore, 'cotorra' is the correct option to complete the sentence.
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