Ice is lighter than water hence the piece of ice always float on the water.

Sun rises in the East in the morning. If we go towards South direction in the morning, we face towards South and our left hand's position is on East direction. Hence, going towards Southwards Sun always appears rising from our left side.

NA

A Race can be without Prize , Victory and Spectators. But Rivals should be there for a valid Race.

A mirror can have Retracts, Reveals the truth, Refracts and Distorts but it must have reflection quality.

A jail can be without a Jailer, Prisoners, lawyers and Bars. But a Jail must have a locks.

A hospital can be without Nurse, Bed, Telephone and Room. A Hospital must have Doctor.

A school can may be without Classes, Library, Building and Principal. A school must have Teachers.

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A Shoe may be with Laces, Leather and Design but it should have the Sole mandatory.