I believe you could use FIRE.
we consider an organism had metabolizing capability if it manage to absorb nutrients from substance, and secrete it.
Fire has similar feature with this (for example, if it got near woods, fire will consume the woods and got bigger from it, and secrete ash after it done)
The answer is B. They have become habituated to human contact.
<span>The ischemic penumbra can maintain metabolic demand with marginal blood flow from collateral circulation for a maximum of 50% before increasing in size. A penumbra is the area where the flow of blood at about 25 - 50% can maintain normal metabolic demands for 6 - 8 hours only. When it continues to increase, the human cells will die and other neurological activity will be suspended causing the person to die slowly.</span>
If referring to photosynthesis, carbon dioxide is brought into the cholorplast of the plant cell, it is then fixed to RUBP, it will go through a series of Redox reactions and become G3P. RUBP is then recycled and is used to fix more carbon dioxide. You need two G3P molecules to become glucose.
This is called a chemical bond.
