Omnivores consume $.....$

In an ecosystem,rats feed on grains. Name the trophic level to which the rats belong.

At one trophic level,an average of $10 \%$ of the energy taken is turned into its own body and made available for the next level of consumers. What happens to the rest of $90 \%$ of the energy?

In a food chain consisting of grass,insect,frog,and snake,what is the trophic level of the frog?

Which of the following is the correct match between List-$I$ and List-$II$?

List-$I$	List-$II$
$1.$ Producer	$a.$ Rabbit
$2.$ Herbivore	$b.$ Bear
$3.$ Carnivore	$c.$ Algae
$4.$ Omnivore	$d.$ Snake

In the given food chain,suppose the amount of energy at the fourth trophic level is $5 \, kJ$,what will be the energy available at the producer level (in $, kJ$)?
Grass $\to$ Grasshopper $\to$ Frog $\to$ Snake $\to$ Hawk