Black holes grow in size by

Directions: Read the following passage and answer the question that follows.

When a star burns through the last of its fuel, it may find itself collapsing. For smaller stars, up to about three times Sun’s mass, the new core will be a neutron star or a white dwarf. But, when a larger star collapses, it continues to fall in on itself to create a stellar black hole.
Black holes formed by the collapse of individual stars are (relatively) small, but incredibly dense. Such an object packs three times or more than the mass of the sun into a city- size range. This leads to a crazy amount of gravitational force, pulling on objects around it. Black holes consume the dust and gas from the galaxy around them, growing in size.
The Milky Way is said to contain a few hundred million stellar black holes.