The diagram given below shows a body floating in three different liquids A, B and C at different levels.

(a) In which liquid does the body experience the greatest buoyant force?

(b) Which liquid has the least density?

(c) Which liquid has the highest density?

For a floating body, how is its weight related to the buoyant force?

Explain why an iron needle sinks in water, but a ship made of iron floats on water.

It is easier to swim in sea water than in river water. Explain the reason.