I'm assuming you meant and frailness not fertility, in which case it is the oldest old period
Answer:
A
Explanation:
If there are more predators than prey, the ecosystem will fall and the predators will die of starvation or cannibalism
Gene pool Is the sum of the genetic traits
There lungs have a big impact with the gasoline situation it has a very toxic smell and is bad if it’s mixed in with the air molecules.
