White House. Washington, D.C. White House, formerly known as the Executive Mansion (1810â1902), the official office and residence of the president of the United States at 1600 Pennsylvania Avenue N.W. in Washington, D.C. The White House and its landscaped grounds occupy 18 acres (7.2 hectares).
Quick Answer. Ecological balance is a theory stipulating that natural conditions, including numbers of various animal and plant species, remain stable on their own through variations over time.
Introduction. 1  Ecological balance is a kind of stability or persistence that is attained through counterposed forces, and may be conceived of as either precarious, in the analogy of a tightrope walker, or resilient, in the analogy of a well-balanced character (see Figure 1).