Answer:
1 is the non living thing 2 is the living thing 3 is a state of balance and 4 is the a community
The independent Variable or sugar
Answer:
The beaver population increased
The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or Catastrophic events.
The circulatory system takes the carbon dioxide from the cells to the lungs and the respiratory system expels ir.