Answer: Water, Oxygen, and Carbon Dioxide
Explanation: The water travels to get to the root of the plant so it could help the plant grow. The oxygen travels through the somata so it could be a waste from the plant through the process of photosynthesis. The carbon dixoide travels in as an input for photosynthesis.
You can infer that the parts of the body with the most touch receptors are the most important in receiving touch stimuli from the environment.
Answer:
The second arrow (the middle one)
