Question

How does galaxy composition typically relate to the age of the stars in the galaxy?(1 point) Responses Star formation and the presence of young stars is common across galaxies, regardless of the proportions of dust and gas present. Star formation and the presence of young stars is common across galaxies, regardless of the proportions of dust and gas present. Star formation consumes dust and gas, so galaxies where stars are oldest typically consist of higher proportions of dust and gas than other galaxies. Star formation consumes dust and gas, so galaxies where stars are oldest typically consist of higher proportions of dust and gas than other galaxies. Stars form from dust and gas, so galaxies with younger stars typically consist of higher proportions of dust and gas than other galaxies. Stars form from dust and gas, so galaxies with younger stars typically consist of higher proportions of dust and gas than other galaxies. Star aging emits gas and dust, so galaxies with the youngest stars typically have the lowest proportions of dust and gas

Answer 1

The correct response is: "Stars form from dust and gas, so galaxies with younger stars typically consist of higher proportions of dust and gas than other galaxies."

This is because young stars form in regions rich in dust and gas, indicating active star formation and a relatively young stellar population. As stars age and eventually die, they can produce materials that either enrich the surrounding medium or, in some cases, reduce the amount of gas and dust due to processes like supernovae. Therefore, galaxies with a significant number of young stars typically have higher amounts of available dust and gas for star formation.