A general term for narrowing would be contracting. I assume that this is applicable to the rectum, as it is a muscular tissue, and muscles are able to expand (extend, rather), and contract.
Hope this helps. And I hope I'm the brainliest!
Answer: The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn
Explanation: As can be seen from the energy diagram, the reaction which leads to burning of candle and shown by a blue curve require higher activation energy , i.e energy required to cross the energy barrier and get converted to products. It also takes more time for completion.
The reaction which leads to exploding firework and shown by a orange line and requires less activation energy , i.e energy required to cross the energy barrier and get converted to products. It takes less time for completion.
A traditional flood control method used to keep a stream's flow in its channel is known as <em /><u>artificial levees.
</u>Artificial levees are forms of dykes or floodbanks used to regulate water levels and prevent any flooding from happening. <u>
</u>
Answer:
It helps in the packaging and distribution in cells.
Explanation: