Answer:
The dam,blocks off water from countine flow, and the result slows down the system
Explanation:
I think it is keystone. If they were not there the population of urchins would go up and the kelp would go down.
Answer: A weather or sounding balloon is a balloon (specifically a type of high-altitude balloon) that carries instruments aloft to send back information on atmospheric pressure, temperature, humidity and wind speed by means of a small, expendable measuring device called a radiosonde.
Water is stored mainly in the central vacoule of a plant cell.
