WILL GIVE BRANLIEST-Read the passage from "Why the Leopard Can Only Catch Prey on Its Left Side.” At one time leopards did not know how to catch animals for food. Knowing that the cat was very [skillful] in this way, Leopard one day went to Cat and asked very politely if she would teach him the art.

Which detail from the passage is an opinion?

Cats can catch their food.
The leopard is polite to the cat.
The leopard asks the cat for help.
Leopards did not always know how to hunt.