Sunlight is the major source of 

Discouraging the use of poison to kill fish in a large water body is a way of

The pathway through which nutrient are replenished and circulated in an ecosystem is called a

The illustration below is a food chain. Study it and answer questions 29 and 30.
             Grasses → Grasshoppers → Lizards → Hawks

Which of the following statements is not correct about the food chain? The number of 

Grasses → Grasshoppers → Lizards  → Hawks

If the individual species of organisms in the food chain are counted and arranged as a pyramid, the result would be a pyramid of