Neutralisation is when you have a strong acid and also a strong base (alkali) E.g 7 ph.
It’s the first choice because the C at the end does not pair with anything, it was an extra pair that was made
Exceptions to a and b are when volcano forms at hot spots in the middle of Continental plates or oceanic plates.
So the similarity of the planets and the dwarf planets are they are both mostly round because they have sufficient gravity to flatten their own surfaces into a sphere. The differences are that planets are big enough to clear the whole region of space where they orbit the sun whereas dwarf planets do not.