Which organism is formed by the symbiotic association between algae and fungi?

Statement $X$: Lichens are composed of two main components. Statement $Y$: In lichens,the phycobiont is the heterotrophic component and the mycobiont is the autotrophic component.

Lichens are a well-known association between algae and fungi,where the fungus .........

Ribovira is a group of viruses which contains

Which of the following can photosynthesize at low temperature?

Assertion $(A)$: Viruses are considered as a link between living and non-living things.
Reason $(R)$: Viruses are inactive and behave like non-living matter in a free state,whereas they show active and living behavior inside a host cell.