Hey, J’ai répondu aux trois questions qui sont visibles sur ta photo. J’espère que ça t’a aider :)
1/ the whales all died of heart failure. They all have enters the North Sea by mistake and the sea floor is too shallow for these deep sea dwellers. It caused the whales to become disoriented and perish.
2/ What is the most worrying about this is the fact that the scientific discovered a lot of plastic inside the whales stomachs. It can causes digestive problems and malnutrition for them.
3/ They are not, sea turtles are also affected by this plastic problem and all the marine life in general.