Which gases contribute to the greenhouse effect? A. nitrogen and helium

B. carbon dioxide and methane

C. carbon dioxide and helium

D. nitrogen and methane

B. Carbon Dioxide And Methane

Explanation:

Greenhouse gases include carbon dioxide, methane, nitrous oxide and other gases that accumulate in the atmosphere and create the heat-reflective layer that keeps the Earth at a livable temperature.

The answer is B

Explanation:

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pls mark brainlest

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