Answer: A. lichens have fungal hyphae that are efficient at absorbing water and minerals to support mutualistic cyanobacteria.
Explanation:
Photosynthesis, is referred to as the process whereby there's transformation of light energy to chemical energy by green plants and some other other organisms.
We should note that for lichens, they can do photosynthesis in harsh habitats such as on the surface of rocks, where there is no soil and little water because they have fungal hyphae that are efficient at absorbing water and minerals to support mutualistic cyanobacteria.
Therefore, the correct option is A.
Answer: The broadest group for classification is "Domain".
Domain is a taxonomic group that lies above kingdom level and divides all life forms into three broad categories that is Archea, Bacteria, and Eukarya.
On the contrary, Taxon is a rang or a unit (like species, genus, class) that is designated in the biological classification of organisms.
Thus, b) Domain is the right answer.