Which Caracteristic of life is best shown by this diagram

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.

a time line cause it goes from 685 to 978

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.