The statement best describes the big bang theory is the universe began at a single point and has been expanding since its formation. The correct option is D.
What is big bang?
The big bang is the theory which explains that how the universe began. It says that the universe began with just a single point. It went on expanding and stretched to grow as large as possible. It is still now expanding.
The big bang consist of fully dark matter, interstellar gases or dust. The big bang is increasing just because in universe there is abundant of hydrogen and helium.
The radiations come from the big bang. These rays are also called as cosmic wave. This big bang is still on it way of expanding more.
Thus, the statement best describes the big bang theory is the universe began at a single point and has been expanding since its formation.
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