| vole (one type ofrodent) | eats plant roots |
|---|
| wood lice | eats bark |
| foxes, shrews, owls | eat meat |
| Carnivore | what does it eat? |
| Owl | vole, lice, shrew |
| Foxes | shrew, voles. |
| Shrew | Lice and insects. |
Now let’s check the statements
1. If the roots of the tree develop a disease, then voles and foxes will starve and not the owls. It is wrong because roots develop disease then tree will die then,lice will also die, Owl will suffer. Hence, statement (1) is wrong. So, (1) and (3) are eliminated.
2. Population of voles is dependent on wood lice population through food web. It’s not the case (as made clearthrough above table) so, second statement is incorrect. So, (2) is eliminated.
Thus, we are automatically left with the statement (4) i.e. only 3 is correct