Because they needed to have something to cook with and olive oil is a main thing to start the night off of cooking whatever meal it might be.
Answer:
The start of Islam is marked in the year 610, following the first revelation to the prophet Muhammad at the age of 40. Muhammad and his followers spread the teachings of Islam throughout the Arabian peninsula. Soon after the death of the prophet
checks and balances or maybe veto? I don't truly understand your question, sorry.