Please help me out, thank u.

Mineral C

Explanation:

Mineral C can scratch apalite, due to its higher hardness, but can be scratched BY feldspar due to it being slightly lower than feldspar.

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