Question

please match the following terms and their definitions: * 4 points cosmic background radiation (cmb) red shift mixture/abundance of light elements the big bang theory a scientific theory of how the universe began. it is supported by three main pieces of evidence but still has many unanswered questions

Explanation:

The definition describes a theory about the universe's beginning. The Big Bang Theory is the scientific theory explaining the universe's origin, supported by evidence like CMB, red shift, and light element abundance.

Answer:

The Big Bang Theory (the option corresponding to "A scientific theory of how the universe began. It is supported by three main pieces of evidence but still has many unanswered questions")