Association between blue-green algae and fungi is called as

Lichen:

1. The relationship between blue-green algae and fungi is called lichen.
2. This relationship benefits both partners, so this relationship is called mutual symbiosis.
3. In this regard, algae produce food because they are photosynthetic organisms, and fungi protect algae
4. As well as algae collect moisture and anchor the lichen body.

Final answer: Association between blue-green algae and fungi is called lichens.