Give a geographical reason for each of the following:

(i) NIFE is so called.

(ii) The core of the earth is the most inaccessible part of the earth.

(iii) The earth's crust undergoes many changes.

(i) NIFE is so called as Ni stands for Nickel and Fe stands for Iron.

(ii) The core of the earth is the most inaccessible part of the earth because it lies thousands of kilometers deep inside the earth.

(iii) The earth's crust undergoes many changes due to the forces of nature.