What is true about the efficiency of energy transfer in an ecosystem?

 Very inefficient. Almost 90% of all energy is lost between trophic levels. That is why larger animals need to eat more, because less energy is being consumed. 

Energy is lost as it is transferred between ecosystem trophic levels; the efficiency of this energy transfer is measured by NPE and TLTE.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey

3. is true i think i should be right