What are trophic levels?

I need an easy definition

Please help

"The trophic level of an organism is the number of steps it is from the start of the chain."

Explanation:

Hope this helps. Google as source.

the genotypes would be 50% bb and 50% bb

the phenotypes would be 50% brown and 50% white. hope this : )

the correct answer is(the type of energy described here is potential energy.)

explanation: now if the person holding the bow and arrow has now let go. the arrow shoots forward toward its target. the   type of energy then becomes