Answer:
cyanobacteria
green algae and brown algae
Step-by-step explanation:
The correct answer would be cyanobacteria, green algae and brown algae
Lichen is a composite organism that is formed between a mutualistic association of fungi with cyanobacteria or algae. The fungus supplies the association with important nutrients and water while the cyanobacterium/alga contributes by supplying food through photosynthesis.
Ascomycete represents a class of fungi such as yeast and mold whose spores are carried within a specialized structure known as the asci. They largely form symbiotic associations with algae resulting in lichen.
Hence, the correct answers include cyanobacteria, green algae and brown algae.