The correct answer is (a) Lactobacillus. Lactobacillus is a genus of bacteria that are commonly found in the human gut. They are also used in the production of fermented foods such as yogurt, cheese, and sauerkraut. Lactobacillus are responsible for the fermentation of milk, which is the process that produces curds.
Oscillatoria is a genus of cyanobacteria that are found in both fresh and marine water. They are photosynthetic organisms that produce oxygen. Funaria is a genus of mosses that are found in moist, shady environments. They are non-vascular plants that do not have roots, stems, or leaves. Streptococcus is a genus of bacteria that are commonly found in the human mouth and throat. They can cause a variety of infections, including strep throat, scarlet fever, and pneumonia.
Lactobacillus are the only organisms listed that are involved in curd formation. They are responsible for the fermentation of milk, which is the process that produces curds.