Who chose to settle in the Jordan valley near Sodom?

Answer: Lot

Lot chose the whole plain of the Jordan and moved near Sodom.

“So Lot chose the whole plain of the Jordan for himself and set out toward the east. And Abram and Lot parted company. Abram lived in the land of Canaan, but Lot settled in the cities of the plain and pitched his tent toward Sodom.”— Genesis 13:11-12 (BSB)