Without external and internal stimuli, your body would not be able to maintain homeostasis. Homeostasisis a property of systems that regulates their internal environment (blood levels, temperature, nutrient levels, etc.) and tends to maintain a stable, constant condition despite changing external conditions.
Answer:
the answer is plant growth
The correct answer would be B. Ureters
I know this is correct so i hope this helps! :)
The Answer Is A. Hope This Helps ;P