What does it mean when we say that conservation biology is a normative discipline?
a. it argues that extinctions are not natural, and should always be prevented
b. none of these
c. t's a discipline that is neutral to the question of whether biodiversity should be preserved
d. it's a discipline that embraces particular values

the right option is; decreased genetic variation  

decreased genetic variation describes the effect of this environmental change.

genetic variation is the naturally occurring genetic diversities or differences between organisms of the same species in a population. genetic variation allows the survival and adaptability of a species when they encounter changing environmental conditions. when an endangered species reduces, it loses genetic variation which may not be restored even if the species rebound and will only be recovered through the gradual collection of mutations over many years.

this website has a good chart outlining your exact question