Which characteristic is not associated with malawi? low population density location in the great rift valley abundant fertile land and water location on lake nyasa

The correct answer is - low population density.
Malawi has a territory of 118,484 square km, population of 18,091,575 (2016 census), thus having a population density of 128.8 people on a square km. This is a population density that is well above what is considered a low population density. 

Answer the use of flood plains and irrigation;