If the bolded word is <em>nobody, </em>then the correct answer is - this is an indefinite pronoun.
Since you don't really know who this nobody person specifically is, it is indefinite.
A good sport would be option B because the others aren't good or at least do not position yourself in a good way.
Answer:
1. Alex and Martha say goodbye to them afterschool.
2. The puppies playfully bit it (or maybe them?) on the nose.
3. The mom and dad loved them very much.
4. The children fought with them on the playground.
If I'm wrong, I'm sorry.
The answer is we’re it says what good shake and he will fall of the train