Why do floodplains make good farmland?

The water brings in nutrients to the soil therefore making the plants have a lot of nutrients. Also, the water helps plants grow too.

The formation of the floodplain on a valley floor is caused by the river . The river channel naturally meanders through the landscape and over time deposits sand , silt and other soil forming material , especially during floods . These deposits provide fertile soil for agricultural production

Brazzaville and kinshasha, luanda,librevilleand and monrovia.

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )