Pick and copy all the incorrect options for the following question:

Trees need oxygen. Roots close to the surface of the ground take in the oxygen the tree needs. Which organisms help trees get oxygen?

Options:
- woodpeckers making holes in the tree
- earthworms making holes in the ground near the tree
- mushrooms growing at the base of the tree
- squirrels eating walnuts on the ground near the tree



- woodpeckers making holes in the tree





- mushrooms growing at the base of the tree



- squirrels eating walnuts on the ground near the tree

