Question

the solar nebula was
○ the charged particles that surround the sun and spread through the solar system.
○ the planetary nebula from which the planets formed.
○ a rotating cloud of gas and dust out of which the solar system formed.
○ a separate galaxy which merged with the milky way and triggered the formation of the solar system.

Explanation:

The solar nebula was a rotating cloud of gas and dust from which the Solar System formed. The first option describes the solar wind, not the solar nebula. The second option is incorrect as the planetary nebula is a different astronomical object. The fourth option is wrong as the solar nebula was not a separate galaxy.

Answer:

a rotating cloud of gas and dust out of which the Solar System formed.