Detailed environmental reconstructions, based on fossil animal bones, of the daka member of ethiopia’s middle awash deposits .
a. demonstrate that asian homo erectus lived in a rain forest. provide a detailed picture of the habitat in which homo erectus lived about 1 mya.
b. provide a detailed picture of the habitat in which australopithicines and homo habilis coexisted about 2.5 mya.
c. prove that in certain areas of africa, there were no large mammals, only "microfauna" consisting of mice and similar creatures.

b. provide a detailed picture of the habitat in which australopithicines and Homo habilis coexisted about 2.5 mya

Explanation:

→Deposits of  sediments  in lakes and rivers,;

 →Low carbon isotopes ratio from  carbonate deposits from fossils analysis; showed a wet habitat , and therefore type and population of  flora.

Thus  these evidences showed  the nature of habitat inhabited by the australopithecines .

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the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.