A. Absorption of water
B. Presence of micro-organisms
C. Absorption of food nutrients
D. Retention of unwanted foreign materials
Correct Answer: Option B
B. Presence of micro-organisms
A. Absorption of water
B. Presence of micro-organisms
C. Absorption of food nutrients
D. Retention of unwanted foreign materials
Correct Answer: Option B
B. Presence of micro-organisms
Copyright warnings! Do not copy.