Answer:
B. Morphology
Step-by-step explanation:
morphology studies words and how they are formed or how they relate to other words in a sentence such as in terms of structure.
Morphology is attained here since the animal understands grammatical rules and sentence structures such as where some parts of speech may appear- verbs, adjectives or nouns. The animal has however not learnt to use these sentences as in speak and so may not be seen to have achieved phonology in the above example