The most appropriate magnetization M versus magnetising field H curve for a paramagnetic substance is

The most appropriate I-H curve for a paramagnetic substance is

The variation of magnetic susceptibility (chi) with magnetising field for a paramagnetic substance is

Magnetic susceptibility of a paramagnetic substance is

Magnetic susceptibility of a paramagnetic substance is

Why does a paramagnetic substance display greater magnetisation for .the same magnetising field when cooled. How does a diamagnetic substance respondto similar temperature changes?