The big apple tree is very tall and strong. People enjoy the cool under it and birds sing in it. In spring, people can enjoy its beautiful flowers. In autumn, people can eat the sweet apples on it. ①So people like it very much and look after it well. But no one notices the little plant next to the tree because no one needs its help.
One day, ②the two have a talk. "Look, little one," says the big tree, "my feet are deep in the ground and my head is high in the air." "I don't need to do that," the little plant says. "I think I may be safe this way." "Safer?" says the big tree. " I am safer than you !"
After that, a strong wind comes. It blows down （吹倒） the big tree. But the little plant is still there, ③__________ the little plant can move in response （响应） to the wind. The big tree doesn't know this.
