Question

what is a food chain​

Answer 1

Answer:

food chain is a series of organisms in which each creature eats the one below it in the series and becomes a source of food for the organisms above it.

hope it helps.....

Answer 2

Answer:

food chain is a chain that shows the flow of energy from levels to levels of producer nd consumers

It is same as the echo, but the distance between source of sound and also the obstacle through which it gets reflected is more less in case of this reverberation.