In a forest - animals like voles and woodlice feed on plant roots and barks respectively. Among the other carnivores - foxes - shrews and owls are present in that forest. Following predictions are made by a group of observers who have visited the forest. 1. If the roots of the tree develop a disease - then voles and foxes will starve and not the owls. 2. Population of voles is dependent on wood lice population through food web. 3. If owl population declines - it will indirectly affect wood lice population. 4. If barks of tree are affected due to a disease - then reduction of wood lice will affect the shrew population forcing owls to eat more voles. Which of the above predictions is/are correct?