Question

ra) vacuum
(b) water
(C) steel
(d) Air
​

Answer 1

Answer:

clean with a vacuum cleaner.

Water, a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states.

Steel is an alloy of iron with typically a few percent of carbon to improve its strength and fracture resistance compared to iron

The atmosphere of Earth is the layer of gases, commonly known as air