Question

an extremely strong gravitational influence, even on objects that are incredibly far away. the sun and the rest of the solar system orbit the milky ways center from over 25,000 light - years away.
the immense gravity of the milky ways central black hole, as well as gravitational attractions between massive objects within the milky way, help hold the entire galaxy together.
select the true statements.
gravitational forces hold the entire milky way galaxy together.
the sun is at the center of the milky way galaxy.
the solar system is the only planetary system in the milky way galaxy.
there is a supermassive black hole at the center of the solar system.

Explanation:

1. The text states gravitational forces (from the central black hole and between massive objects in the Milky Way) hold the galaxy together, so this statement is true.
2. The text notes the Sun orbits the Milky Way's center from 25,000 light-years away, so the Sun is not at the galaxy's center.
3. The text provides no indication the solar system is the only planetary system in the Milky Way; this is factually false as we have observed many other planetary systems in the galaxy.
4. The text specifies the supermassive black hole is at the Milky Way's center, not the solar system's center (the Sun is the center of the solar system).

Answer:

A. Gravitational forces hold the entire Milky Way galaxy together.