I'm pretty sure it's the Eichhornia crassipes. It is a water hyacinth, and it was overgrown in the Lake Victoria area.
Answer:
European Union created an open market where goods and people are being transferred without limitations that existed when the borders were closed. That is why people can freely travel, get jobs and many other benefits inside the member countries of EU.
Explanation:
The idea of EU started developing after WW2, and the countries that started developing that idea were France, Germany and Benelux countries.
It has developed into one of the most important economic forces in the world, and also unified Western Europe in a common struggle for a better life.
Tropical climates are characterized by monthly average temperatures of 18 °C (64.4 °F) or higher year-round and feature hot temperatures. Annual precipitation is often abundant in tropical climates, and shows a seasonal rhythm to varying degrees.
Area. Around the equator, from 23.5° further north to 23.5° southern latitude.
Sun path. Sun at the zenith (90°) at least once per year, never lower than 43°
Average temperature. >20 to 30°C.
Minimal temperature. 0°C (no frost)
Maximal temperature. Up to 40°C (seldom more)
