Question

4. Air is lighter than water.
Use the word: 'light' instead of lighter'.​

Answer 1

●Correct answer:- Water is not so light as air.

#_100% correct✌

Answer 2

Explanation:

lighter-than-air. light·er-than-air. designating or of an airship or a balloon designed to be aloft by means of a gas, as hydrogen or helium, that is lighter than air. MLA Style. "Lighter-than-air."

Hydrogen and helium are the most commonly used lift gases. Although helium is twice as heavy as (diatomic) hydrogen, they are both significantly lighter than air, making this difference negligible.

In contrast to lite, we use light in all formal writing when something is literally less heavy than another thing. For example, you would say that a feather is lighter than a rock. Light can also be used as a verb, e.g., the candle lights up the room, and a noun, the light of the fire.