Pick out the most effective pair of words from the given pair of words to make the sentences meaning fully complete.
Myth About Animal
An Elephant Never Forgets
This expression likely stemmed from the fact that the elephant has biggest brainof all land animals and apparently, the bigger the mass, the better the memory Elephants are able to retain a mental map of their entire home range were talking an area the size of Rhode Island! Elephants also travel in packs and when the group gets too big, the eldest daughter breaks off to start her own contingent, yet she never forgets her roots One researcher witnessed a mother and daughter elephant recognizing each other after 23 years of separation.