Haustoria are associated with which one of the organism having group:

Explanation

The correct answer is Fungi. Haustoria are specialized structures used by parasitic fungi to invade host tissues and extract nutrients, a characteristic not found in bryophytes, angiosperms, or algae. Bryophytes, such as mosses, absorb nutrients through their surfaces without specialized structures. Angiosperms include flowering plants, some of which may have parasitic adaptations, but the term 'haustoria' is more typically associated with fungi. Algae are primarily photosynthetic and do not form haustoria.