What is the main difference between carbohydrates and proteins

Carbohydrates is an energy giving food therefore the end product is glucose, while protein is a body giving food therefore the end product is amino acid.

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 

the correct answer is 2 and 4