The Call of the Wild suggests that Buck's greatest asset is his: instinct work ethic imagination strength

Strength

Explanation:

A one hundred and forty pound, half St. Bernard, half Scotch shepherd mix, Buck is a proud, strong, and intelligent creature. After being kidnapped from his home in Santa Clara, California, he becomes a powerful sled dog in the Canadian Klondike. As Buck goes deeper into the wilderness, he transforms from a pampered pet into a fierce animal, who ultimately masters the ways of the wild and his own fate.

(Tell me if i'm wrong, and i'll edit this)

i cannot see any of the options                                                          

where are the options? i can try to if you add them : )