Final answer:
All the options listed are examples of behavior in plants.
Step-by-step explanation:
The correct answer is d. All the options listed are examples of behavior in plants. A. The trap of a Venus flytrap snapping shut in less than a second is an example of rapid movement in response to stimuli. B. Tobacco plants producing nicotine and shunting it to their leaves when neighboring sagebrush are attacked by herbivores is an example of chemical signaling and defense. C. Plants releasing pheromones to attract natural enemies of the herbivores attacking them is an example of using chemicals to attract predators of herbivores.