B>it's because it states there is only one.
Answer:
In conclusion, although animals and humans can have some shared social and cognitive skills, language always requires more cognitive skills and learning a language is uniquely corresponds to human beings. Besides, animals cannot learn a human language, because animals cannot go futher than imitating and memorizing their owner’s words.
Explanation:
After we had waited for twenty minutes
is the answer ^
Hi some synonyms of obstinacy are determination , purpose and stubbornness.Some examples are a senator who staunchly refuses to compromise and She refused umpteenth times to eat broccoli .
