Which of the following constitute a food-chain?
A. Grass, wheat and mango
B. Grass, goat and human
C. Goat, cow and elephant
D. Grass, fish and goat
Answer:B
Which of the following constitute a food-chain?
A. Grass, wheat and mango B. Grass, goat and human C. Goat, cow and elephant D. Grass, fish and goat