ENVIRONMENT

GIVE SINGLE TERM FOR THE FOLLOWING 1. It is the only planet in our solar system on which life exists    --------------------. 2. It is the most dynamic component of the environment            --------------------. 3. Mass of water on the earth's surface                                        --------------------. 4. It is the sphere of land                                                              -------------------. 5. It is the area demarcated for the protection and conservation     of wild animals.                                            ...