Answer:
Explanation:Toxic materials e.g synthetics
They become even more toxic as they are converted to more toxic products by reaction with other substances or by metabolism of microorganism
I believe it’s A I think, I think I’m right
Well, According to
<span>
BBC - GCSE Bitesize: Blood,
</span> White blood cells can engulf bacteria and other pathogens by phagocytosis. They can change shape easily and produce enzymes that digest the pathogens. Other types of white blood cell secrete antibodies that help destroy pathogens.
There are very interesting facts, and stories to that site, Plus, I am not Copying and pasting, If I ever do, I tell you the site to where it Found your answer too. :)
