Radical 口

11 strokes

mouth 口 (5) + pull 拉 (179) = exclamation 啦

This is an abbreviation for 了啊 (“le” plus “a”, Characters 66 and 143).

(Think of this as a continuation of the previous story) The boy points at the mouth of the cave, pulling at his rescuer’s sleeve. “Over there ! Look !” he exclaims. / The robot, covered in bits of lava, has reached the safety of the cave and is trying to clean himself up.