The push factor of migration of population is

Natural Disasters

The correct answer is Option (3) → Natural Disasters

Push Factor in Migration: Push factors are conditions or circumstances in a person's current location that encourage or force them to leave. They are often negative aspects of their current situation that make staying there undesirable. Natural disasters include events like earthquakes, floods, hurricanes, tornadoes, droughts, wildfires, and tsunamis. These catastrophic events can have severe and immediate impacts on communities, leading to damage and loss of life, property, and livelihoods. After experiencing a natural disaster, people often face difficult conditions such as destruction of homes, loss of crops, and inadequate access to clean water, food, and healthcare. This can make their current location uninhabitable and untenable resulting in migration.

The other three factors viz Better living conditions, Better job opportunities and Peace and stability are pull factors attracting people to migrate.