How does weak background radiation coming from every direction in the sky support the big bang theory

1. it provides evidence of universe expansion

2. it provides evidence of universe contracting

3.it provides evidence of the universe's increasing mass

4.it provides evidence of the universe's decreasing mass

Option 1

It provides evidence of universe expansion

Explanation:

The Big Bang Theory actually explains the universe as originating from a single point, which expanded as billions of years went by.

The background radiation supports this theory in the sense that if the universe is expanding, this means that the universe is cooling and continuously losing heat, which results in background radiation

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide