A.) Soil Fertility "Gradually Increase" <span>during the early years of primary succession</span>
c.tissue - the epithelium is a kind of tissue that makes up several organs in the body.
Aerobic exercise stimulates the heart rate and breathing rate to increase in a way that can be sustained for the exercise session. In contrast, anaerobic ("without oxygen") exercise is activity that causes you to be quickly out of breath, like sprinting or lifting a heavy weight.
