To answer this question, the user needs to have some knowledge about environmental conservation and the purpose of various books.

Option A is incorrect because the Red Data Book is not related to drought-hit places.

Option B is correct. The Red Data Book is a compilation of the world's endangered species of animals, plants, and fungi. It is a comprehensive list of threatened species with the aim of protecting them from extinction.

Option C is incorrect because the Red Data Book is not related to the hottest places on earth.

Option D is incorrect because the Red Data Book is not related to earthquake-prone areas on earth.

Therefore, the correct answer is:

The Answer is: B. Book showing list of animals, plants and fungi which are under the threat of extinction.