B) The diagram shows how the electric supply cable is connected to an electric kettle. The earth wire is connected to the metal case of the kettle.
If a fault makes the metal case live, the earth wire and the fuse inside the
plug protect anyone using the kettle from an electric shock. Explain how.*
Heating element
Earth wire
Live wire
Neutral wire

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

What does the start look like

The density of the block of iron is lees than the density of mercury but the density of the block of iron is greater than the density of water

The answer is: c. from underground