The farming of fish such as salmon at aquaculture facilities poses a threat to marine ecosystems because the farmed fish can escape and outcompete wild fish for food and territory Answer A: the farmed fish can escape and outcompete wild fish for food and territory A farm-raised salmon often pass on toxic chemicals such as mercury to eagles and other fish-eating birds Answer B: farm-raised salmon often pass on toxic chemicals such as mercury to eagles and other fish-eating birds B invasive plant species common in aquaculture facilities can spread to nearby waters Answer C: invasive plant species common in aquaculture facilities can spread to nearby waters C fewer wild fish will be harvested for human consumption