If animals don't adapt to it they can die.
C.
It is d, becuase you divide 500 by 15, and that is the closest answer
I don't know if you mean, like, historically or in relation to the scientific method...
I know he was a monk... (I think it was his job to be the gardener too)
But you're supposed to observe before you can come up with a question that you would then answer through experimentation.