What are 3 reasons ton why north Korea invaded south Korea?

North Korea invaded South Korea in 1950 primarily to reunify the Korean Peninsula under its communist regime, viewing the South as a threat to its ideology. The North sought to gain control over the economically prosperous South to bolster its own economy and military power. Additionally, the invasion was influenced by the Cold War dynamics, with North Korea receiving support from the Soviet Union and China, which encouraged its aggressive actions against the U.S.-backed South.