Stone : Hard :: Feather : ?

The answer to the question “Stone : Hard :: Feather : ?” is A. Soft.

A stone is hard, while a feather is soft. This is because a stone is made of minerals, which are hard materials, while a feather is made of keratin, which is a soft material.

The other options are not correct because:

• Option B, “White”, is not a property that is shared by both stones and feathers. Stones can be of many different colors, and feathers can also be of many different colors.
• Option C, “Bird”, is not a property that is shared by both stones and feathers. Stones are not birds, and feathers are not birds.
• Option D, “Fly”, is not a property that is shared by both stones and feathers. Stones do not fly, and feathers do not fly.