Choose which facet of sustainable development the following things belong to.

1. Favoring railway traffic instead of automobile traffic.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.

2. Lowering the income disparity between the poor and rich members of the population.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.

3. Providing political stability on a long time scale.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.

4. Reducing the amount of personal debt.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.

5. Increasing the percentage of renewable energy sources used in energy production.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.

6. Increasing the level of education.

Ecological sustainability.
Economic sustainability.
Social and cultural sustainability.