Answer:
<h3>mesosphere seems to be very important for the earth atmosphere because It keeps the planet warm and protects us from the harmful radiation of the Sun. It also ensures a healthy balance between oxygen and carbon dioxide so that life can be sustained on the planet.</h3>
<h2>hope it helps. </h2><h2>stay safe healthy and happy.</h2>
The answer for your question is letter A
Answer:
First option: Help build the railroads.
1. Conserve water.
2. Refrain from polluting the atmosphere.
3. Refrain from dumping waste products in water bodies.
4. Refrain from indiscriminate deforestation.