Arrange the phases in the life cycle of the Sun in order from the birth of the Sun to the time in the far distant future when the Sun has cooled. Tiles

becomes a black dwarf

becomes a white dwarf

begins nuclear fusion at its core

casts off matter as planetary nebula

exists as it is today

enters red giant phase

exists as it is today

casts off matter as planetary nebula.

begins nuclear fusion at its core

enters red giant phase

becomes a white dwarf

becomes a black dwarf

Tiles

Explanation:

The solar system is formed over 4 billion years ago. It is formed from big cloud and gases called nebular.

The nebular collapsed and be one denser. The core of nebular becomes hot and undergo nuclear fusion reaction. nuclear reactions tends to expand it outwards. The gravitational collapse is balanced by the expansion due to fusion energy.

It will then expand and cool to become red giant. It will then shrink and heat up again to become white dwarf. These will slowly cool down for years.

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.