In 2011, the United Nations declared a famine in the southern Somalia regions of Bakool and Lower Shabelle, and Al-Shabaab reversed an earlier pledge to allow aid agencies to provide food in famine-stricken areas.
Ecosystem definition, a system, or a group of interconnected elements, formed by the interaction of a community of organisms with their environment. See more. Dictionary.com
A TIA is a sudden episode in which there is a brief interruption in blood flow to part of the brain. The term  mini-stroke  refers to a transient ischemic attack (TIA for short). In a mini-stroke, there is a short-term interruption in blood flow to the brain.