All of the options listed can be formed from nebulae. Nebulae are clouds of gas and dust in space, and they serve as the birthplaces of various astronomical objects. Planets can form from the dust and gas within a protoplanetary disk surrounding a young star. Stars are also formed from nebulae, specifically from the gravitational collapse of dense regions within them. Moons can form around planets either through the capture of passing objects or through the accretion of material in the planet's protoplanetary disk. Lastly, galaxies, which are massive collections of stars, gas, and dust, can also form from the gravitational collapse and merging of numerous smaller nebulae.
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All of the options listed (planets, stars, moons, and galaxies) are formed from nebulae.
