Final answer:
The correct option is B. The question discusses dark energy, a mysterious force driving the accelerated expansion of the universe, which, along with dark matter, comprises most of the universe's energy content. These concepts are fundamental in understanding the large-scale structure and evolution of the cosmos.
Step-by-step explanation:
Dark energy is a new form of energy that is responsible for the acceleration of the expansion of the universe. It is inferred from observations of distant supernovae and is a mysterious and relatively unknown constituent of the universe.
Dark energy is thought to provide additional pressure to drive the expansion of the universe. These concepts are fundamental in understanding the large-scale structure and evolution of the cosmos.