I think the Arabs think that Santiago and the alchemist are spies. They allowed Santiago and the alchemist to keep the treasure because both have claimed that treasure doesn't have to be something material. The treasure can be something spiritual.
Let's number them okay. Since I can't see everything that is said in the picture I will have to assume it is either number 3 or 4.
Answer:
u cant pay happinesss hapines is on your mouth
A leader so your answer would be c
Because of their cultural and economical differences.