The Quraan was verbally sent down in parts to The Blessed Prophet Muhammad (peace be upon him) by the archangel Gabriel (Jibril) at the age of 40. The Quraan was finally compiled after the Prophets' death at 63 during the ruling of Umar son of Khattab (RA).
Please do NOT quote me on this. I will look further into it if needed.
C and D are the best answers out of the bunch
When you heat air it expands. When air expands it becomes less dense than the air around it, in turn making it rise.
Hope that helped
The correct answer to this open question is the following.
Although the question is incomplete because it does not provide a specific reference about the author of the letter or any other reference, we can comment on the following.
A primary source is the piece of information that was written by a character or an individual that lived in the moment of the event, was part of the event, or witnessed the event. This individual could have written a letter, or a document -including a book. Or he/she took a photograph. Or was part of an interview. The secondary source includes information from a third person who was not part of the time or event but has found information through other resources. It is the case of an encyclopedia or researchers/historian books.
Sheesh this is a legit question 5 to buy
