Answer:
4. p.complement system c.saliva b.sneezing
Answer: Disagree
Explanation:
I tend to disagree with this statement because predators actually have a place in ecosystems to keep prey species from becoming overpopulated, hence, the extent of the overpopulation would likely have been much less if the natural predators were allowed to play a role in controlling the deer population.
Answer:
Gravity
Explanation:
When its altitude is matched by the pull of the Earth's gravity, a satellite circles Earth. The satellite will fly off into orbit in a straight line or crash down to Earth without this equilibrium.
By juggling two things, a satellite retains its orbit: its velocity (the speed it takes to travel along a straight line) and the gravitational force on it that the Planet provides. To resist the greater gravitational force, a spacecraft orbiting closer to the Earth needs more velocity.