Answer: D absorb from soil
Explanation: just took the test
<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>
The sun is the ultimate source
<span>They convert sunlight into chemical energy.</span>
Answer: b
Explanation: i got the answer wrong and i’m looking at the results rn
