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b) obtain and process materials needed for cell activities.

Explanation:

An organism needs (obtain) food, in order to live, which is to allow the organs to function (process)  well.

i got  B

Explanation: The life process by which organisms obtain and process food.

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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