Questions

Egypt is called as the gift of the Nile river. It is called so because the nile river served as means for transport, help in irrigation for farming, made soil fertile for growing crops. It made the Egyptian civilization possible. 

The geosphere is the earth's solid rock or rigid outer layer known as the crust. Without the geosphere it would not be possible for humans to live on the planet. The function of the geosphere serving as the interface between the other spheres.

Here in the given options, The girl, whom you have met yesterday is my sister is the sentence which has relative pronoun.

The pronoun which is used to connect a clause or phrase to a noun or pronoun is called as relative pronoun.

The most common relative pronouns are who, whom, whose, which, and that. Sometimes when and where can also be used as relative pronouns.

All the carbon atoms in glucose ultimately incorporated during cellular respiration into carbon dioxide molecules.

M.Visweswariah is known as the Father of Indian Engineering.

Father of Indian Printing - James Hickey

Father of Indian Green Revolution - Dr. M.S. Swaminathan

Father of Indian Painting - Nandalal Bose.