Identify any problems with your immune system early and to increase the stress you
Answer:
Its D ,scientific theory
Explanation:
- Its is basically a claim made by the scientists that is reliable and it can be proved over time .
- The theories that are known to us already as a fact , have more chances of acceptance for example :-
<em>newton's theory of gravity</em>
- If a theory is able to predict new phenomenon ,It can gain allot more support
- A theory can change over time as well as new claims are made and new researches are done ,it can evolve .
okay here it is ,hope this helps . As your lungs expand, air is sucked in through your nose or mouth. ... After passing through your bronchial tubes, the air finally reaches and enters the alveoli (air sacs). Through the very thin walls of the alveoli, oxygen from the air passes to the surrounding capillaries (blood vessels).