Which treatment would be considered gene therapy? O introducing a new gene to the body
O removing an organ that is not working properly
giving medicine to kill infections
O giving medicine to match the effects of a gene working correctly

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

for a different answer set the answer would be because the oxygen in the water had depleted (apex)

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.