Answer:
not notice the older woman
Explanation:
With a lot of people in one place, it more difficult for Arlette to see the older woman and notice her problem. She probably only looks at what is in front of her eyes and in her way, not the sides if she is in a hurry or entertained with something. The noise who emit the people blocks the sound of the pain of the old lady.
Answer:
The simple answer would be by, "checks and balances", is how the two branches check upon each other. However there are specific methods in doing "checks and balances," hope this helps as a starting point to your question!