The correct option is A Fungi
The bread shown in the given picture is spoilt due to mold growth. Mold is a type of fungus whose spores are afloat in the air. In the presence of moisture, dark place, cool conditions, and minimal circulation of air, these spores land on the food item, here, bread. They feed on starch and start multiplying. In the process of obtaining nutrition, they release poisonous chemicals called mycotoxins. These toxins make the food inedible.