The option that describes an economic push factor is hyperinflation.
Economic push factors are conditions that drive people away from their home country or region, often related to economic instability or hardship. Hyperinflation represents a situation where prices rise uncontrollably, eroding purchasing power and leading to economic chaos, which can compel individuals to seek better opportunities elsewhere.
The other options, such as brain drain and remittances, are more related to the consequences of migration, while land ownership can be a push or pull factor depending on the context.