Answer:
In primary succession there is no presence of soil or the soil cannot support life in secondary succession there is a presence of soil in which it can support life
Explanation:
The answer is true because the signal of a perceiver is a technique to determine the ability.
Artificial active immunity. I'm a bio major, hope I helped :)
It gets polluted from fertilizers or any spilled chemicals. And those chemicals get obsorbed into the ground. And the gravity pushes them deeper in the soil, till it reaches the underground water (or aquifer)
