I think that answer is they are like Opposite poles of magnet.
I really hope it’s right
A. They had different types of food. This resulted in many different breeds of finches.
1) all of the above
2) rocketry
3) 1
4) not sure about this one because magnitude of one was the brightest then 2, then 3. 6 was the least brightest and 6+ or -1 or 0 or you could say, below 1 did not exist at that time..