Because they easily take over farmlands
North Atlantic Deep Water (NADW) is a deep water mass formed in theNorth Atlantic Ocean. Thermohaline circulation (properly described as meridional overturning circulation) of the world's oceans involves the flow of warm surface waters from the southern hemisphere into the North Atlantic.
The answer would be a. hope that helped
The answer to this question is Heart Attack, Or Myocardial Infarction