Which Linux distribution is used as a basis for the creation of Ubuntu Linux?

Red Hat Linux uses the RPM package format and YUM/DNF package manager, which are architecturally incompatible with Ubuntu's APT/.deb ecosystem.

Arch Linux is an independent, rolling-release distribution using the Pacman package manager and has no lineage connection to Ubuntu.

SUSE Linux is an independent distribution also based on RPM packaging, unrelated to Ubuntu's Debian heritage.

Gentoo Linux uses a source-based package system called Portage and has no relationship to Ubuntu's binary package infrastructure.

Ubuntu was founded by Canonical in 2004 as a Debian-based distribution; it uses the same APT package manager, .deb package format, and draws directly from Debian's package pool, particularly from the Debian unstable (Sid) branch as its upstream source.