You can tell if matter is conserved if the substance changes . If the substance changes then matter has been conserved .
rocks can become soil in multiple different ways one could be primary succession which means some algae or moss grows onto rocks with out soil then they slowly gain moisture which attracts some other plants like flowers which then breaks down the rock into smaller things then grasses come in and turns it into soil.
Mainly by nitrogen-fixing bacteria in the soil and oceans
<span>I think it would be A.) Anemia, reducing the delivery of oxygen to the brain </span>
The answer is 30 to 80 percent its in google
