A is the answer ps i am also vietnamese
This is primarily because the sun heats the earth's surface unevenly. As heat is trans- ferred to the air, we get regions of warm and cool air which can turn into regions of low and high pressure. This difference in pres- sure makes a force that causes the wind to blow.
So I would say the rising of warm air and the falling of cool air.
The Egyptian civilisation was built along the river Nile and the annual flooding of the river allowed for rich soil, meaning that crops could easily be grown. : )
The statement; “The comet cools down and begins to glow brightly as a result of this decreased temperature.” is considered false. Study shows that comets can be seen because their comas and tails reflect the light from the sun or would usually glow as they absorb energy from the sun. Comets are provided with energy from the Sun , so its movement is always away from the Sun.
Canberra, hope this helped:)
