A, because its thick fur is designed to keep it warm, it would over heat and unfortunatly die
Plants, Fungi, and <span>Prokaryotes</span>
Foxes Hawks and Owls will have to rely on other sources for food and be the most directly effected. You could make the argument that all the organisms will effected as some will see increased predation, while the plants will see a reduction in herbivores eating them.
They are called reactants