Read the excerpt from "The Willow-Wren and the Bear.” When the time came for the war to begin, the willow-wren sent out spies to discover who was the enemy's commander-in-chief. The gnat, who was the most crafty, flew into the forest where the enemy was assembled, and hid herself beneath a leaf of the tree where the password was to be announced. There stood the bear, and he called the fox before him and said: 'Fox, you are the most cunning of all animals, you shall be general and lead us.' 'Good,' said the fox, 'but what signal shall we agree upon?' No one knew that, so the fox said: 'I have a fine long bushy tail, which almost looks like a plume of red feathers. When I lift my tail up quite high, all is going well, and you must charge; but if I let it hang down, run away as fast as you can.' When the gnat had heard that, she flew away again, and revealed everything, down to the minutest detail, to the willow-wren. When day broke, and the battle was to begin, all the four-footed animals came running up with such a noise that the earth trembled. The willow-wren with his army also came flying through the air with such a humming, and whirring, and swarming that every one was uneasy and afraid, and on both sides they advanced against each other. But the willow-wren sent down the hornet, with orders to settle beneath the fox's tail, and sting with all his might. When the fox felt the first string, he started so that he lifted one leg, from pain, but he bore it, and still kept his tail high in the air; at the second sting, he was forced to put it down for a moment; at the third, he could hold out no longer, screamed, and put his tail between his legs. When the animals saw that, they thought all was lost, and began to flee, each into his hole, and the birds had won the battle.

Which evidence best supports the conclusion that this story was written for children?