What eventually weakened the Mongolian Empire?

After Kublai's death in 1294, the Mongol Empire fragmented. ... It had begun to decline significantly in the mid-14th century, however, after outbreak of the Black Death and the murder of one of its rulers. The Golden Horde finally broke apart into several smaller territories in the 15th century.

Explanation:hope this helps brainlist plsss:) have a nice day !!!

. austria-hungary began seizing british colonies in africa.

answer; elasticity of the lungs decreases;