Explain in details a major oil spill happened 20 years ago in the antarctic ocean. since then, scientists have been studying its effects on the food chains in this area, like the ones shown in the figure. what prediction can be made about how the presence of the oil spill continues to affect the animals shown in the web? compare the effects now with those expected 20 years later and be sure to include specific examples of the impact on the different trophic levels.