Which option distinguishes the natural resource in the following ? Between the time settlers first moved to North the year 1907. one resource shrank by 12 percent. coal
grassland
waterways
forestland

d. changes in climate and historical records

hope this

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.