D. Islands used for agriculture
Im sorry girl Im not sure EXACTLY what your looking for but 3 huge industries in Europe are oil, tourism, and agriculture
The rabies virus spreads through animals (well known carriers of the disease are dogs and cats, there are also squirrels) and it can cause deadly affects. While the flu is passed around between humans and is easily treatable and a lot less deadly than rabies.
(Even though the flu can lead to death by causing a colossal amount of inflammation in a person's lungs, which can lead to respiratory failure. Also, when someone has the flu, they become more vulnerable to a bacterial infection that can lead to pneumonia.)
Ocean floor subducts under continents because the ocean floor is softer and the crust in here is with lesser density and thickness, while the continents are harder because their crust is thicker and has bigger density. So when they collide, the softer ocean floor is pushed downwards by the harder continental crust.
