Explain how the energy and biomass are used by the organisms in a food chain.

The energy of the sun is used by the primary producers i.e. autotrophs to make energy-product as glucose. The glucose or organic compound produced is consumed by the heterotrophs, the secondary or tertiary consumers. This process starts the food chain. The inference is that autotrophs from sunlight creates the biomass.

In the trophic level of food web the 90 per cent of the energy is lost only 10 per cent comes to use, also the biomass decreases with the upward direction of trophic level.

It can be explained that some of the energy consumed, is immediately lost as in process of respiration, metabolic activity and some is stored in the body. Consumers also excrete so the biomass lessen this way also.

Biomass is the total mass of the organism at the trophic level in food chain.

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.