Question

define food chain with example

Answer 1

A food chain shows how each living thing gets food, and how nutrients and energy are passed from creature to creature.for example :grass-insect(grass hopper)-frog-snake- hawk-plant(fungi)

Answer 2

a food chain shows how each living things obtain their nutrition and how nutrients are passed from one organism to another. 
A food chain consists of the producers and the consumers . The plants are the producers where as the animals (including humans) are  the consumers.
 
A SIMPLE FOOD CHAIN MIGHT BE LIKE :
PLANTS :   DEER :   TIGER