How do i identify sample, independent and dependent variables?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

The is an estimate of the fewest number of organisms a population needs to avoid extinction. this measurement will most if the number of offspring each female in the population produces increases. if the population's this measurement will most likely increase. 1 population density, minimum viable population, carrying capacity 2 decrease, be unaffected, increase 3 death rate increase, dead rate decrease

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes