1 is wrong, 4 is wrong.
The answer could be either 2 or 3, but it is most likely 2, as the call to action generally takes place at the very end of an essay if it's written correctly.
Answer:
knowledge about the stars
Answer:
It is the speakers body
Explanation:
"Dust" here refers to the remains of a human body. In many funeral services, the presider will say something to the effect of "ashes to ashes, dust to dust."