Negative: the ice is melting meaning sea levels are rising. if sea levels are rising then there is less land. if there is less land then there is less land to be able to farm on
Birth rates: moderate
Death rates: low
population growth: high
Answer:
Gravity
Explanation:
Gravity is a postulate based upon a given factor of proven events, you can always rely on gravity to pull something downwards towards earth.
If the earth's gravitational pull gets three times stronger your weight increases three times your original weight.
