A) biome.........................
From my own knowledge that domestic pets like cats and dogs they self-medicate that they put a monarch in a big cage. Non-medicinal plant on one side and medicinal on the other side, then next is to measure the number of eggs which the monarchs lay on each plant.<span>
<span>The risk of using man-made medicine the time of treating some pathogens is that pathogens they keep on evolving and a lot of developing drugs are losing their efficacy and we have to find great ways to discover drugs which can use against our diseases. Ways in which we can eat some kinds of milkweeds to help monarch survive are transmitting the parasites when laying eggs and sixty-eight percent of the eggs which are laid are medicinal</span></span>
I don't know if their is sopposed to be options but my best educated guess is "Natural"
I think it is called a Case study.
Hopefully it is correct! :)