The desires of the creature change because he want to have a mate and he wants to feel the love the young man and woman portray
A."For the pride of trace and trail as his, and sick unto death, he could not bear that another dog should do his work."
This shows the theme of the love of hard work.
Both hybrids of plants and animals are able to adapt.
I can see many places and learn new things
Answer: C, a well-known, commonly-used saying or idiom.