Answer:
<em>A. Awareness of ourselves & our environment</em>
Explanation:
To be conscious, is to be aware of yourself and your surroundings. If you are conscious, you don't necessarily need to be able to respond -- but you should at least be able to take in basic information surrounding you.
To have consciousness, you should at least have thoughts, perceptions, and possibly feelings.
Hemoglobin: The protien in red blood cells.
