An association between roots of higher plants and fungi is called

1.  lichen

2.  fern

3.  mycorrhiza

4.  BGA

(c)An association between roots of higher plants like gymnosperms and angiosperms and fungi is called mycorrhiza. The fungus is dependent on plants for food and shelter, while the plants are benefitted by the fungal hyphae as they are involved in absorption of water and dissolved minerals presentin the soil debris and makes it available to the piants.
Lichens are the symbiotic association between algae and fungi.
Ferns are members of a group of vascular plants that reproduce via spores and have neither seeds nor flowers.
BGA is blue-green algae with a prokaryotic cell.