Afield grows only one type of sunflower. why might the farmer only grow that type of sunflower?

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg