Ecology - A branch of science that deals with the relation of organisms to one another and their physical environment.⏎
Disease - Any abnormal condition that affects all or part of an organism, resulting in symptoms such as pain or loss of function.⏎
El Niño-Southern Oscillation Cycle (ENSO) - A combination of two events, El Niño and La Niña, which are periodic disruptions in the ocean’s temperatures. As a result, the temperatures are warmer or cooler than usual, which has an impact on weather patterns worldwide. ⏎
Egg Cell - The female gamete, or sex cell, which carries the hereditary material of the female parent and unites with the male sperm cell during sexual reproduction.⏎
Encephalitis - Inflammation of the brain, often caused by a virus.⏎