The main causes of a habitat degradation is pollution, invasive species, agriculture development, diminished resources, such as water and food, urban sprawl, logging, mining, destructive fishing practices and the disruption of ecosystem processes, such as altering that intensity and frequency of fires in an ecosystem. Hope this helps x
They are found in the center of the osteon within a long opening called the Haversian canal.
Area a because it experienced a growth from 0 to 15 in 5 years while area b experienced a growth of growth 10
