Answer: Palms.
- A Palms
- B Grapes
- C Barley
- D Rice
Correct answer: A. Palms
Explanation: Toddy is a traditional drink of some parts of southern India made by fermenting sap obtained from palms.
Sewage passes through physical removal (primary), then aerobic biological treatment where microbes form flocs that consume organic matter (secondary); the settled activated sludge is then digested anaerobically to produce biogas - a deliberate switch from aerobic to anaerobic conditions between stages.
Concept context
Microorganisms in food, medicine, sewage treatment, biocontrol, and biofertilizers