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From among the sets of terms given
below, identify those that are associated
with the gynoecium.
Stigma, ovule, embryo sac,
placenta
Thalamus, pistil
, style, ovule
Ovule, ovary, embryo sac, tapetum
Ovule stamen, ovary, embryo sac​

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.