¿cual es la diferencia entre turista y excursionista , peregrino y emigrante , piloto y azafata?

We must find the differences between:

Turista (tourist) and Excursionista (hiker)

The tourist is someone that is traveling in some region, with the focus in cultural places, while the hiker points more at nature.

peregrino ( pilgrim) and  emigrante (emigrant)

Pilgrims are people that visit sacred places and travel in strange lands, while an emigrant is someone that leaves is motherland.

piloto (pilot) and azafata (hostess)

The pilot is the one that pilots, for example, a plane, while the hostess usually takes care of the passengers.

b.

explanation:

just because.

well, the b sentence is the only one that has sense.