Question

What is dark energy?​

Answer 1

Answer:

D) Whatever is causing the accelerating expansion of the universe.

Explanation:

Scientists have come to believe that we live in an open universe with a poorly understood effect called Dark Energy, which causes the accelerated expansion of the Earth.

(If you are doing the multiple choice quiz, this is the answer.)

Answer 2

Answer:

theoretical form of energy postulated to act in opposition to gravity