Answer:
I think It might be deletion mutation

LOWA is the state which is bordered by the Mississippi River on the east , the Missouri River and the Big Sioux River on the western side .
HOPE IT HELPS YOU.
-- One feature of Earth is an atmosphere rich in nitrogen and oxygen.
Very unusual.
-- Another feature of Earth is vast quantities of liquid and solid water.
Very unusual.
-- Another feature of Earth is a range of temperatures near the melting point
of water.
Very unusual.
A. Add up individuals who came into the area because of reproduction or immigration