Symbiosis describes close interactions between two or more different species. There are four main types of symbiotic relationships: mutualism, commensalism, parasitism and competition. Symbiotic relationships are important because they are a major driving force of evolution.
Border Security. Exporters. Definition. For C-TPAT purposes, an exporter is defined as: A person or company who, as the principal party in interest in the export transaction, has the power and responsibility for determining and controlling the sending of the items out of the United States.
In a nutshell, net exports is the amount by which foreign spending on a home countryâs goods or services exceeds or lags the home countryâs spending on foreign goods or services. 1  Mineral fuels including oil: US$26.7 billion (Down by -40.5% since 2009) 2  Cocoa: $889 million (Down by -37.5%) 3  Oil seeds: $270.1 million (Up by 43%)