Question

which is evidence of universe expansion that supports the big bang theory? (1 point)
the temperature of the universe has cooled over time.
the temperature of the universe is the same as it was at the time of the big bang
the temperature of the universe has cooled and warmed repeatedly over time.
the temperature of the universe has warmed over time.

Explanation:

The Big Bang Theory states that the universe started from a hot, dense state and has been expanding. As the universe expands, it cools down. So the evidence of universe expansion supporting the Big Bang Theory is that the temperature of the universe has cooled over time. The other options are incorrect: the temperature is not the same as at the Big Bang (it has cooled), it has not cooled and warmed repeatedly, and it has not warmed over time.

Answer:

The temperature of the universe has cooled over time.