The correct answer is C: has so many effects on organisms and land.
The fascinating subject of the El Nino weather phenomena has been studied vigorously - and rightly so. Scientists must continue to research this topic because it has adverse effects on land, creatures that live there and oceans as well. It is intimately connected with the weather systems of the world that it is of the utmost importance to know as much as possible about it. El Nino is a useful model for predicting both long and short-term climate changes. El Nino further impacts global economies and ecologies.
