I'm not 100% sure, but I'd say the availability of vaccines and medicine.
Answer:
well you didnt give me a link to the story or text so i dont have any info to answer sry ;(
Explanation:
C. dodo birds.... Hope this helps
Answer;
-Structural isomers.
Explanation;
-Isomers are molecules that have the same molecular formula, but have a different arrangement of the atoms in space.
-Structural Isomers are molecules which have the same molecular formula but have different connectivities. That is; the molecules have the same molecular formula, but their atoms have different arrangements or bonds.
-For example, butane and isobutane are structural isomers, also called chain isomers. In chain isomers, the carbon atoms are connected in different orders. Isobutane and butane have a molecular formula of C4H10.