Definition.com
Ecosystem is the environment viewed as a delicately balanced Rube Goldberg contraption: discarded Balloon (A) chokes Duck (B), which expires and pollutes Pond (C), which kills Minnow (D) , which drives away Pied-billed Grebe (E) , which distresses Birdwatcher (F) , who contributes to Friends of Wetlands (G), which lobbies in Congress (H) , which passes Antipollution Law (I), which cuts profits at Toxico, Inc. (J) , which lays off 20 percent of its Payroll (K) including Stanley Frirnko (L), who now has more time to walk in the park with his daughter Danielle (M), who lets go of Balloon (N), which unfortunately pops in the Stratosphere (0) and drops into Pond (P), where it catches the attention of Duck (Q).