I don't understand, what is the question you're supposed to answer?
A. parasitism. The plasmodium is helped while the human host, harmed.
b. mutualism. The bacteria is supplied with a living environment while the host human is supplied with vitamin K
Hydrogen bonds can form between regions of polar molecules that are <span>oppositely charged.
Source credit: </span>https://quizlet.com/16761990/biology-chapter-22-saud-flash-cards/