Which statement best describes the two tails of a comet? heating by the sun, the comets rotation, gravitational effects of nearby planets, or solar wind

Heating by the sun.

A comet tail, and coma are features visible in comets when they are illuminated by the Sun.

Illuminated; lit with bright lights.

just did the assignment and the answer was #1 +2 n

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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~ trueboss72