They sent a rabbit to go steal the fire from the weasels.
The rabbit swam across the water. Then while he danced, he stole the fire by setting his hair on his head on fire. By doing this, he placed pine sap on his head, which is flammable.
Sometimes you need to be brave to help someone in need no matter the dangers ahead. "Animals were afraid of the Weasels because they were bloodthirsty and ate mice and moles and fish and birds." This quote shows that although the weasels were bad creatures, the rabbit was brave enough to withstand the terror they caused and receive the fire. He was also brave because he set his head on fire, without any doubts that it wouldn't work. The rabbit was also grave because he didn't care about what might happen to him or the people after the fire was stolen. One last way the rabbit was brave was that he crossed the ocean that was too deep for anyone else to cross. He swam over to the weasels domain without hesitation.