<span>Alternating between running and walking is important, especially if you're not a professional runner. You should be walking from time to time to recover a bit from the strain that the running put on you, but not too much or your body starts to cool down and then you have to work all over again or you might lose energy.</span>
I believe that this would be deforestation because the trees' roots keep the soil in place whereas if they were gone the soil would be loose.
Answer is number 6 hope i help
C)Pacer Test or Mile Run.
