in 1998, scientists discovered that the expansion of the universe has been accelerating. what force is…

in 1998, scientists discovered that the expansion of the universe has been accelerating. what force is causing this phenomena?\no dark energy\no hubble’s law\no the doppler effect\no background radiation

in 1998, scientists discovered that the expansion of the universe has been accelerating. what force is causing this phenomena?\no dark energy\no hubble’s law\no the doppler effect\no background radiation

Answer

Answer:

A. dark energy

Brief Explanations:

Dark energy is hypothesized to drive the accelerating expansion of the universe. Hubble's law describes the relationship between galaxy - recession velocity and distance. The Doppler effect is about frequency changes due to relative motion. Background radiation is leftover from the early universe and not related to the accelerating expansion cause.