The sentence that is true is A galaxies are holder together by gravity it is not D because galaxies are real its not C because they are not being pulled apart and its not B because galaxies are held together.
A scientific theory<span> is a well-substantiated explanation of some aspect of the natural world that is acquired through the </span>scientific method<span> and </span>repeatedly tested and confirmed<span> through </span>observation<span> and </span>experimentation.<span> Scientific theories are the most reliable, rigorous, and comprehensive form of scientific </span>knowledge.
