Answer:
I believe it would be these:
He can replace the 1.5-volt battery with a battery of higher voltage.
He can use a longer piece of wire that wraps more times around the bolt.
I'm not sure the others would work
It is predation. How?
What do you think will happen if the fox catches the rabbit.
The fox will eat it.
Thus, predator-prey relationship; the fox gets full, and the bunny, well, it's not so good.
The awnser is b there is a mutation in the gene
Whats the question here?? are you asking which disease she has????