The answer is 'The Biosphere.'
The right answer for the question that is being asked and shown above is that: "b. Archaeopteryx fossils share traits with both birds and reptiles."
It is Big Bang and cannot be proved. A hypotheses must be testable. Big Bang is not testable.
HIV in fact kills the immune system cells causing our body cannot fight off infections and diseases from entering our body. this creates our immune system to become weaken.
