Nagaina gathered herself together and flung out at him. Rikki-Tikki jumped up and backward. Again and again and again she struck, and each time her head came with a whack on the matting of the verandah, and she gathered herself together like a watch spring. Then Rikki-Tikki danced in a circle to get behind her, and Nagaina spun round to keep her head to his head so that the rustle of her tail on the matting sounded like dry leaves blown along by the wind. He had forgotten the egg. It still lay on the verandah, and Nagaina came nearer and nearer to it, till at last, while Rikki-Tikki was drawing breath, she caught it in her mouth, turned to the verandah steps, and flew like an arrow down the path, with Rikki-Tikki behind her. When the cobra runs for her life, she goes like a whip-lash flicked across a horse's neck.

How does the antagonist move the plot forward in this excerpt?

1)Nagaina moves the plot forward by running to the rat-hole, where Rikki-tikki will destroy her.
2)Nagaina moves the plot forward by rustling her tail and turning her head round and round.
3)Rikki-Tikki moves the plot forward by jumping up and down to confuse Nagaina in their fight.
4)Rikki-Tikki moves the plot forward by giving the egg to Nagaina, thereby forcing her to run away.