Madagascar is a country rich in nature.

Changes in the social system inevitably occur with time.

Slavery is something that robs human dignity and is absolutely unacceptable.

Feudalism characterized the social system of medieval Europe.

A matrimonial quarrel is one of the factors that disturb the peace of the home.

They are a husband and wife pair who is no longer in love, a mere facade.

This is part of my collection, especially the Arabian cowry is rare.

The Japanese river otter is an endangered species and is a target for nature conservation.

The Japanese tree frog is a beautiful frog that lives in the forests of Japan.

The Japanese wolf is one of the extinct species.