Displacement is shortest distance from starting point, 4km.
One of the main reasons why there is a need to create additional three kingdoms was due to the invention of the microscope. The scientific device paved way for a more intensive study of the tiny organisms most considered as single-celled which cannot be seen by the naked eye.
Answer:
Extreme warm weather, glacial melting, rising sea levels, Ocean Acidification,Animal Migration and Extinction of Species, The Increase of Health Issues and Costs.
