Answer:
having exactly the same DNA sequences, twins start accumulating genetic variation from the earliest stages of development, researchers at Iceland-based company deCODE genetics found, meaning that one twin harbors variants that aren't present in the other.
I think all three ideas should be selected since they were all in the blue box so it seems like it’s included
It would be at a convergent plate boundary
Diffusion is is like (spreading around), so it wouldn't smell that strong the further away you got... but you would still smell it
