2) Wood is heavier than cotton.

Iron is the heaviest of all.

3) Silver is more expensive than bronze.

Gold is the most expensive of all.

4) A car is faster than a bicycle.

A Train is the fastest of all.

5) A cat is slowlier than a cheetah.

A snail is the slowliest of all.

6) A horse is taller than a sheep.

A giraffe is the tallest of all.

7) Wood is softer than steel.

Wool is the softest of all.