This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
As , we all know that Our universe is expanding , So for expandation there will be some energy due to which it is extending , We still doesn't know much about that energy , that's why it is named as Dark Energy