Answer:
Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.
I have no idea but i think because long term activation is long term rather than nuclear. this is wrong
The answer is lower because having to return to a pre disturbance size will likely affect its genetic variation to be lower compared to the original population where in its genetic variation will be greater compared to those in pre disturbance size.