<span>Hey There Welcome To Brainly ,
Natural springs are not a means of water erosion. Some types of water erosion include rain, streams, rivers, and ocean waves.</span>
Answer:
idhar re baba
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A normal heart rate ranges between 60-100 beats per minute. The higher the heart rate is, the faster the blood is pumping through the heart. When exercising a persons heart will be higher because the brain and the muscles in the body are in need of oxygen so the heart needs to pump faster in order to sustain optimal performance.<span />
Answer:
A. the frequency will decrease because all mutations are harmful, thus People with the mutation will die.
