Which of the following statements are true about the magnetic susceptibility ${\chi _m}$ of a paramagnetic substance?

$A$ diamagnetic material in a magnetic field moves:

The permanent magnet is made from which one of the following substances?

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$. Consider a ferromagnetic material:
Assertion $(A)$: The individual atoms in a ferromagnetic material possess a magnetic dipole moment and interact with one another in such a way that they spontaneously align themselves forming domains.
Reason $(R)$: At high enough temperature, the domain structure of a ferromagnetic material disintegrates. Thus, magnetization will disappear at a high enough temperature known as the Curie temperature.
In the light of the above statements, choose the correct answer from the options given below:

If a magnetic substance is kept in a magnetic field,then which of the following substances is thrown out?

The magnetic susceptibility of a paramagnetic material at $-73^{\circ} C$ is $0.0075$. Its value at $-173^{\circ} C$ will be