Answer:
The correct answer is - warning system.
Explanation:
Warning systems are a type of system that could be technical or biological in nature that can help in assessing or inform about the possible danger or change in a particular setting such as ecosystem, weather, water quality, and many others. It helps in avoiding such threats before occurring or become serious threats.
Certain biological species that live or require a particular set of conditions for their survival and reproduction can act as a biological warning system for water pollution, air pollution.
It can be called<span> a draw, a wash or a gulch</span>
D) gut with four stomach chambers. If you have anymore questions feel free to ask me.
Removing the oxygen in water
Answer:
tetrads change orientation as a lineup along the center of the cell