Closed-canopy forests, which most people regard as the (i) ___ state of nature, may actually be man-made. In fact, the forest floor is too barren to support large numbers of grazers, and the canopy is too dense to let light-hungry trees like oaks sprout and grow. Yet traditional forest management usually winds up (ii) ___ deer and bison when their behavior starts to affect trees. The tragedy is that biodiversity is (iii) ____ on the altar of the closed-canopy forest.
Attack the blank (i)- there is a clear hint of change in direction, so we are looking for something not "man-made" -> natural (best suits with "normal")
Blank (ii) - I couldnt grasp the meaning as readily, and couldnt guess the word as blank(i). In such cases try to pick-up hints from options (as last resort) & lets assume like in my case you dont the know meaning of "culling"
a. from the options its clear "feeding" & "domesticating" are more or less like synonyms .. gives a hint for 3rd option
b. with this lets look at the sentence and plugging, so if i plug in "feeding" and "domesticating" sentence does not make such sense.
e.g. winds up "feeding" when their behaviour starts to affect the trees ?
and moreover next sentence starts with "tragedy"
I believe thats ample of hints to eliminate "feeding" and "domesticating" and go with "culling". However if you knew the meaning then awesome you dont need to do this.(from now onwards you would know
)
Blank(iii). Going with the assumption we dont that "culling" means. Sentence begins with "tragedy" giving the hint blank (iii) has a -ve connotation. "sacrifice" is the only option which fits this profile.