Hi to give clarification this question is asking about indirect objects and indirect object pronouns.

How does adding a + pronoun or a + noun help you understand the meaning in different sentences?

I'm not really sure because u can use both.

Bolsa can be referring  to any type of bag,

The answer should be:

a. el rey de francia

Im not sure what im suppose to answer here, but here it is in english if it . 

on the ship where do you eat? what are you eating? what's on the table? what do you do in the youth club? what are you doing in the pool? where do you sleep? what are you looking at in the theater? how is the weather like today where you live? what time is it in the summer? what are you wearing today? what do you wear, when you go to school? where are  you going today? and tomorrow?