Which of the following is correct sequence in food chain

Which of the following is the correct sequence in the food chain?

Which of the following is the correct sequence in the food chain?

Rewrite the following in their correct sequence in a food chain : Grass rarr Tiger rarr Deer

Rewrite the following in their correct sequence in a food chain : Snake Peacock rarr Rat rarr Wheat

Rewrite the following in their correct sequence in a food chain : Snake rarr Grasshopper rarr Grass rarr Frog

Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction) ?